(23 Aug 2015, 4:16 pm)R852 PRG wrote I think it could be the state of the buses themselves. Then again, these cascades from London could just be a way of finding those buses another lease of life in the fleet with constant upgrades in London. I'm not particularly knowledgable in either subjects.
if you think about it the ex london buses could be any age because london seem to get new buses quite often so really we could get anything