On Wednesday, the police began searching the River Thames as the concern grows for the “vulnerable” autistic student. CCTV footage released by the police on Tuesday of Mr Parker, shows him walking in the direction of his home across the river in Lambeth after leaving Heaven nightclub in the early hours of Friday morning.

       On Wednesday, police confirmed they were searching the river after “a review of CCTV in the area that indicates that Harvey may have entered the water near the Golden Jubilee Bridge”.

       The force said that “there is nothing to suggest that there is any third party involvement.”

       Detective chief inspector Lucy O’Connor, from Central South Safeguarding Unit, said: “We are doing all we can to find Harvey, and working closely with our colleagues in the Marine Policing Unit.

       “We are keeping Harvey’s family fully informed of any developments; and the thoughts of my colleagues and I are with them at this distressing time.

       Anyone with information is asked to call 101 or tweet @MetCC. Please quote CAD 3134/18DEC21.

       Earlier in the week, Ms Parker told Metro: “We alerted the police, we went down to Heaven to see if anyone knew or heard anything to really get the ball rolling.

       “We’ve gone to hospitals with his pictures, we’ve phoned every big A&E in London, I’m just beyond words to be honest, I really am.

       “Harvey is very engaging, has lots of friends and is quirky. At the same time Harvey’s very vulnerable and can misread a situation and get overwhelmed.

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