Boris Johnson is to hold talks on the Ukraine crisis with Nato’s secretary general on Thursday before flying to Poland on a trip designed to reassure eastern European allies about the UK’s support in the face of Russian aggression.
Meanwhile Liz Truss will become the first British foreign secretary in more than four years to visit Russia, where she will tell counterpart Sergey Lavrov that it is time for Moscow to call off its build-up of troops near the border with Ukraine.
The Polish foreign ministry in Warsaw indicated that Mr Johnson will meet prime minister Mateusz Morawiecki and resident Andrzej Duda, and he is also expected to visit British troops in the country.
And Nato announced that the PM will hold talks with secretary general Jens Stoltenberg at its Brussels HQ ahead of a joint press conference early on Thursday morning. Labour said that leader Sir Keir Starmer will also meet Mr Stoltenberg in Brussels later in the day.
Defence Secretary Ben Wallace is also expected to visit Moscow this week as part of the high-level international push to resolve the crisis.
Recommended How Tories claimed Boris Johnson’s quiz had ‘no alcohol’ before booze photo emerged UK's Johnson signals early end to COVID isolation rules The absolute lack of ‘Brexit opportunities’ has been laid bare | James Moore
Ahead of her visit, Ms Truss said: “The UK is determined to stand up for freedom and democracy in Ukraine.
“I’m visiting Moscow to urge Russia to pursue a diplomatic solution and make clear that another Russian invasion of a sovereign state would bring massive consequences for all involved.
“Russia should be in no doubt about the strength of our response. We have said many times that any further invasion would incur severe costs, including through a co-ordinated package of sanctions.
“Russia has a choice here. We strongly encourage them to engage, de-escalate and choose the path of diplomacy.”
The UK is prepared to impose what Ms Truss has branded “the toughest sanctions regime against Russia we have ever had” if there is an invasion of Ukraine, targeting those closest to the Kremlin.
The visits form part of an intensive period of diplomatic contacts as the international community attempts to defuse tensions around Ukraine.
UK news in pictures Show all 50
1/50UK news in pictures
UK news in pictures 8 February 2022 Workers move a crate containing Season's Greetings by street artist Banksy from a retail unit at Ty'r Orsaf, Port Talbot, prior to its journey to a temporary storage unit at an undisclosed location
PA
UK news in pictures 7 February 2022 Dog walkers enjoy the early morning sunrise at Tynemouth Beach in North Tyneside, on the north east coast of England
PA
UK news in pictures 6 February 2022 A Leicester City invades the pitch as Nottingham Forest celebrate scoring their side’s third goal of the game during the Emirates FA Cup fourth round match at the City Ground, Nottingham
PA
UK news in pictures 5 February 2022 Stadium staff remove a flare from the pitch during the Emirates FA Cup fourth round match at Selhurst Park
PA
UK news in pictures 4 February 2022 "The Nuba Survival" is a five-metre-tall statue of two skeletons locked in an embrace in Checkendon, Oxfordshire. The statue was created by local artist John Buckley
PA
UK news in pictures 3 February 2022 Kew horticulturists attending to the ‘Rising sun’ display at the Kew Orchid Festival: Costa Rica, at the Royal Botanic Gardens in Kew, west London
PA
UK news in pictures 2 February 2022 Protesters campaign against corruption in London
EPA
UK news in pictures 1 February 2022 Lorries queue for the Port of Dover in Kent, as the Dover TAP is enforced due to the high volume of lorries waiting to cross the Channel
PA
UK news in pictures 31 January 2022 Nelson Beaumont-Laurencia applies finishing touches to a sculpture of a tiger, commissioned by Manchester Business Improvement District to celebrate the Chinese New Year, is unveiled in St Ann’s Square
PA
UK news in pictures 30 January 2022 A house on Overhill terrace in Gateshead, lost its roof on 29 January after strong winds from Storm Malik battered northern parts of the UK
PA
UK news in pictures 29 January 2022 A newly painted bicycle sign is seen on the middle of the road at Westminster Bridge, as the new Highway Code rules start today together with giving pedestrians priority at junctions
Reuters
UK news in pictures 28 January 2022 School children take part in a rally in support of British Sign Language becoming a recognised language in the UK, outside the Houses of Parliament, Westminster, as the British Sign Language Private Members’ Bill, introduced by Rosie Cooper MP, reaches its second reading in the House
PA
UK news in pictures 27 January 2022 A rare six-week-old southern white rhino calf called Zawadi, explores her paddock for the first time at Africa Alive! in Lowestoft
PA
UK news in pictures 26 January 2022 British Prime Minister Boris Johnson jogs with his dog Dilyn, in London
REUTERS
UK news in pictures 25 January 2022 A member of staff looks at Francis Bacon’s work ‘Second Version of Triptych 1944’ on display in the Francis Bacon: Man and Beast exhibition at the the Royal Academy of Arts in London
PA
UK news in pictures 24 January 2022 Rowers (front to back) Charlotte Irving, Kat Cordiner and Abby Johnston, on their way to shatter the world record for rowing across the Atlantic
PA
UK news in pictures 23 January 2022 A grey seal pup on the beach at Horsey Gap in Norfolk, as the pupping season draws to a close at one of the UK’s most important sites for the mammals
PA
UK news in pictures 22 January 2022 Participants prepare to take part in the Crisis icebreaker cold water challenge at Tooting Bec Lido in London
EPA
UK news in pictures 21 January 2022 Willesborough Windmill, a white smock mill built in 1869 is bathed in the morning sunshine as the moon sets behind in Ashford, Kent
PA
UK news in pictures 20 January 2022 A jet skier jumps the waves off the coast at Blyth in Northumberland
PA
UK news in pictures 19 January 2022 Britain’s Prince William and Catherine, Duchess of Cambridge, participate in a therapy session with individuals who have experienced the care system, during a visit to the Foundling Museum in London
REUTERS
UK news in pictures 18 January 2022 Surfers enter the sea as the sun rises over Tynemouth on the North East coast
PA
UK news in pictures 17 January 2022 Bonhams’ Danny McIlwraith holds a Nigerian polycrome carved wood mask during a photocall for the sale of the Jim Lennon Collection at Bonhams in Edinburgh
PA
UK news in pictures 16 January 2022 The moon rises above the Spinnaker Tower in Portsmouth, Hampshire
PA
UK news in pictures 15 January 2022 Demonstrators outside Downing Street during a ‘Kill The Bill’ protest against The Police, Crime, Sentencing and Courts Bill in London
PA
UK news in pictures 14 January 2022 Ecologist Emma Smart (left) and retired GP Dr Diana Warner outside HMP Bronzefield, in Surrey, following their release from the prison where Emma undertook a 26-day hunger strike during her incarceration. Ms Smart was sentenced in November, along with other members of Insulate Britain, to serve four months for breaking a High Court injunction by taking part in a blockade at junction 25 of the M25 motorway during the morning rush hour on 8 October last year
PA
UK news in pictures 13 January 2022 A TV presenter holds a copy of a newspaper outside 10 Downing Streetafter the Prime Minister apologised for attending a gathering of colleagues in the Number Ten garden in May 2020, while the UK was in strict lockdown due to the Coronavirus pandemic
Getty
UK news in pictures 12 January 2022 Fitness guru Derrick Evans after receiving an MBE during an investiture ceremony at Windsor Castle
PA
UK news in pictures 11 January 2022 A couple walk underneath an umbrella during wet weather on Westminster Bridge in central London
PA
UK news in pictures 10 January 2022 A jogger passes the Covid Memorial Wall in London
AP
UK news in pictures 9 January 2021 The sun rises over horses at Seaton Sluice in Northumberland
PA
UK news in pictures 8 January 2022 Riders compete during the Veterans Men's race at the UK Cyclo-Cross National Championships 2022 in Ardingly, south of London
AFP/Getty
UK news in pictures 7 January 2022 A dog looks out of a car window at the wintry conditions in Killeshin, Co. Laois
PA
UK news in pictures 6 January 2022 People walk through frost and mist alongside a frozen lake during sunrise in Bushy Park, London
REUTERS
UK news in pictures 5 January 2022 A skier jumps on the slopes at Allenheads in the Pennines to the north of Weardale in Northumberland
PA
UK news in pictures 4 January 2022 Freshly-fallen snow covers houses in Corbridge, near Hexham in Northumberland
PA
UK news in pictures 3 January 2022 Dean Morrison, 13, receives his Covid-19 vaccine from student nurse Anthony McLaughlin during a vaccination clinic at the Glasgow Central Mosque
PA
UK news in pictures 2 January 2022 Konastantinos Tsimikas of Liverpool with Chelsea’s Mason Mount during the Premier League match at Stamfrod Bridge
Liverpool FC/Getty
UK news in pictures 1 January 2022 New Year’s Eve Lasers, drones and fireworks illuminate the sky in front of the Royal Naval College in Greenwich shortly after midnight in London
EPA
UK news in pictures 31 December 2021 Competitors in fancy dress run across the Pennine tops near Haworth, West Yorkshire, in the annual Auld Lang Syne Fell race which attracts hundreds of runners every year
PA
UK news in pictures 30 December 2021 Sunrise at Bamburgh Castle in Northumberland
PA
UK news in pictures 29 December 2021 The Very Revd Dr Robert Willis, Dean of Canterbury Cathedral, looks at Becket, a six month old red-billed chough as he visits Wildwood Wildlife Park in Kent on the anniversary of the murder of Thomas Becket
PA
UK news in pictures 28 December 2021 Troops of the Household Cavalry are seen reflected in a puddle during the changing of the Queen’s Life Guard, on Horse Guards Parade, in central London
PA
UK news in pictures 27 December 2021 A pedestrian walks past a winter sale sign outside a John Lewis store on Oxford street in London
Getty
UK news in pictures 26 December 2021 Riders take their bikes through the snow near Castleside, County Durham
PA
UK news in pictures 25 December 2021 Patrick Corkery wears a santa hat and beard as waves crash over him at Forty Foot near Dublin during a Christmas Day dip
PA
UK news in pictures 24 December 2021 People stand inside Kings Cross Station on Christmas Eve in London
Reuters
UK news in pictures 23 December 2021 Christmas shoppers fill the car park at Fosse Shopping Park in Leicester
PA
UK news in pictures 22 December 2021 The sun rises behind the stones as people gather for the winter solstice at Stonehenge.
Getty
UK news in pictures 21 December 2021 People take part in a winter solstice swim at Portobello Beach in Edinburgh to mark the solstice and to witness the dawn after the longest night of the year
PA
Mr Johnson held talks with Lithuanian PM Ingrida Simonyte in Downing Street and a call with Dutch counterpart Mark Rutte on Tuesday.
Russia has insisted it has no plans to invade Ukraine but President Vladimir Putin has raised concerns about Nato expansion in eastern Europe – Ukraine is not a member of the alliance but has received support from the West.
Recommended Watchdog says Brexit has brought cost, red tape for UK firms Boris Johnson says blaming him for Starmer Jimmy Savile mob ‘lets thugs off the hook’ Ukraine-Russia crisis: What to know about the fears of war