When they withdrew the RT/RTW/RTL family how did LT decide which ones
to withdraw when? Did they follow a similar pattern to, say,
trolleybuses doing a whole garage at a time (I don't believe so)? Did
they withdraw the RTWs first because they were (despite being 500
strong) non-standard? Was it based on an approaching overhaul date
(but that might have made them harder to sell on and lost were sold)?

Anyone know?