Someone asked why the DC3 is not flying in the UK.
There was a bit of a fuss about this in the press, basically it became mandatory for aircraft in its weight class to have TCAS (or was it GPWS ?) and Atlantic, the only operator, decided that the expense was not justified so there are now no examples with a PT CofA in the UK.
A quick search gives
BBC NEWS | UK | England | Coventry/Warwickshire | WWII plane takes last passengers
blaming the EU which is probably rather simplistic