My recollection is that it stemmed from when the Navy EFT pilots were accommodated at Linton-on-Ouse but would drive daily to Topcliffe to go up-diddly-up-up in their puddle jumpers. The challenge for the budding dark blue Top Guns, as they returned to the Mess to celebrate their daily heroics, was to get between the bridge and village limits as fast as possible. While others took on the challenge, it was started by the RN students, hence the ‘Navy run.’ Needless to say, my 1256cc Vauxhall Viva didn’t feature towards the top of the rankings!!