The Wildcats of St. Trinian's
ducati in the middle (triumph bonneville 750's on either side)
a pic of me sitting on one at earls court 1981.!! (a bit too pricey for my pocket, I had to settle for the moto guzzi 850 t4 le-mans conversion.!)
I believe a triumph 'chopper'?
Single cylinder model so it must be a Tiger Cub variant.