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If the Palladium’s clapometer is any guide, the Leave side still has more of the energy and momentum.

But if glum expressions could somehow be totted up and rated for the season – there's an idea for the Sky cameras, instead of filling the screen with blubbing Scousers or Geordies try putting Hughie Green's old clapometer into reverse – here's how the top three might look.

Exhibits including Hughie Green's Clapometer from Opportunity Knocks are moved into storage in 1997 at the National Media Museum - or as it was then, the National Museum of Photography, Film and Television.

Relics of television's past – including Hughie Green's 'Clapometer' – were among the opening highlights at Bradford's National Media Museum.

Many people believe there is an element of Opportunity Knocks and the Clapometer to the judging – the louder the roar, the more chance of scoring high.