Sadly, no Nortons were competing but three John Player Nortons took part in the TT Lap of Honour.
From the left :

Pete Lovell rode Stan Thomas' 1972 Production Racer. Starting nearly last and returning with about 30 bikes ahead of him, Pete must have passed 4 bikes per mile, including the JPNs (ha!). It's not supposed to be a race Peter.
The team mechanics work at fever pitch to prepare the machine for its parade lap.