TC
I haven't been on that unit for some time. But when G-SAEW met it's untimely demise & was replaced by G-SEWP, it was felt by the hierachy that having SEWP the same colour may concern the good people of Wales.
As such an adaption of the blue/ yellow scheme was used to ensure SAEW & SEWP were never mixed up by concerned members of the public.
Cannot comment on it being carried on to the 135. But I think it's
Glad the South Wales consortium have finally got the machine they deserve!
Safe Flying boys!!