Two examples that no longer exist:
Before it was truncated to Carvel Lane, Southern Vectis route 1 was always operated by single deckers due to the low entrance at the Red Jet terminal in Cowes. Was an incredibly challenging turning manoeuvre too.
Unilink route U6 in Southampton used to do a loop of Wessex Lane which involved buses passing beneath the low bridge at Swaythling. Since the route was amended a decade or so ago, double deckers have been able to operate the service.
Before it was truncated to Carvel Lane, Southern Vectis route 1 was always operated by single deckers due to the low entrance at the Red Jet terminal in Cowes. Was an incredibly challenging turning manoeuvre too.
Unilink route U6 in Southampton used to do a loop of Wessex Lane which involved buses passing beneath the low bridge at Swaythling. Since the route was amended a decade or so ago, double deckers have been able to operate the service.