Prince William and Kate Middleton arrive at Royal Ascot

       Prince William and Kate, Princess of Wales have been married for around 13 years having tied the knot on April 29, 2011.

       Their relationship has been under the royal spotlight since they started dating and their very very public facing role has allowed the public to get a glimpse of the kind of couple they are.

       While many aspects of their relationship will be private, body language expert Judi James suggested that the pair use “key traits” to convey their romance.

       She told Express.co.uk: “William and Kate have been keeping royal fans, and each other, supplied with a stream of romantic gestures, tie-signs and touch rituals since they first married but their technique seems to be driven by inclusion.

       “We can see they are a romantic and in-love couple but they never allow their body language rituals together to exclude the viewer.

       READ MORE: Kate’s hug with old schoolteacher shows ‘dramatic’ shift in power balance

       Kate touches William's leg with ‘ownership gesture’ - it's ‘non-negotiable’, expert claims (Image: Getty)

       'It suggests Kate is determined to step slightly outside normal royal protocol' (Image: Getty)

       Expert claims to spot Will & Kate's 'most openly romantic gesture' - 'signals of passion'

       A body language expert spoke exclusively to Express.co.uk about William and Kate's most openly romantic gesture.

       “Subtlety is vital for their public role and as royals they provide signals that they are a strong couple (which is important after the dysfunctional relationship dramas of the previous generation of royals) but that they maintain an even, steady emotional trend rather than a soap opera of passionate highs and lows.”

       According to the expert, one key trait William and Kate use which allows for an insight into the “private nature of their romance” is “touch”.

       Judi claimed that Kate has a particular “ritual” which she has performed a number of times.

       Expert claims to spot Will & Kate's 'most openly romantic gesture' - 'signals of passion'

       A body language expert spoke exclusively to Express.co.uk about William and Kate's most openly romantic gesture.

       A body language expert spoke exclusively to Express.co.uk about William and Kate's most openly romantic gesture.

       “Subtlety is vital for their public role and as royals they provide signals that they are a strong couple (which is important after the dysfunctional relationship dramas of the previous generation of royals) but that they maintain an even, steady emotional trend rather than a soap opera of passionate highs and lows.”

       According to the expert, one key trait William and Kate use which allows for an insight into the “private nature of their romance” is “touch”.

       Judi claimed that Kate has a particular “ritual” which she has performed a number of times.

       “Subtlety is vital for their public role and as royals they provide signals that they are a strong couple (which is important after the dysfunctional relationship dramas of the previous generation of royals) but that they maintain an even, steady emotional trend rather than a soap opera of passionate highs and lows.”

       According to the expert, one key trait William and Kate use which allows for an insight into the “private nature of their romance” is “touch”.

       Judi claimed that Kate has a particular “ritual” which she has performed a number of times.

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       Kate does the same 'touch ritual' at an NBA basketball game in 2022 (Image: Getty)

       She said: “A signature and romantic touch ritual for the couple is this trait of Kate placing one hand on William’s thigh, which she will do even at more formal events.”

       Judi referenced in particular the pair in Canada in September 2016 when they attended the Official Welcome Ceremony for the Royal Tour at the British Columbia Legislature.

       Kate placed her hand on her husband’s knee despite looking in the other direction, and William adjusted his tie as he chatted to Prime Minister of Canada Justin Trudeau.

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       Judi commented on the significance of this moment, claiming: “It’s a gesture of ownership and support but as a romantic gesture it suggests Kate is determined to step slightly outside normal royal protocol to create an intimate tie-sign with her husband.

       “This gesture looks non-negotiable for Kate and William’s reaction is always quietly profound.

       “Here his response smile is bashful and he plays with his tie, a peacocking response to show his pride and ego have just been boosted.”

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