'Red bus' fleets mostly leased and acquired to meet specific contract route awards/renewals, so tied in with Tfl service requirements.
The oldest single deckers are '07/57 reg so coming up for 14 years old, I think someone on this thread said that the maximum age is (was?) 14 years.
Plenty of pre 2007 buses in service in the rest of the country, although as others have said, many London buses see 7 days a week constant service in heavy traffic, so may be 'older' in terms of wear & tear on mechanical units.
The oldest single deckers are '07/57 reg so coming up for 14 years old, I think someone on this thread said that the maximum age is (was?) 14 years.
Plenty of pre 2007 buses in service in the rest of the country, although as others have said, many London buses see 7 days a week constant service in heavy traffic, so may be 'older' in terms of wear & tear on mechanical units.