Didn't refurb Class 50s have grey roofs?
They wouldn't have been Stratford-based locos!
Steph
They did, that's why I wrote 'Stratford' highlighted as a general term, the grey roof was applied to later locos but not in pure BR blue colours, only Stratford applied their grey roof's to BR blue locos, the others (as far as I know) were all applied to 'Large Logo' locos which I thought was not classified as true BR blue era engines.
56 084 was the first large logo loco with a grey roof and was out shopped from Doncaster in Oct 1980, somebody must have thought it fitting as the class 50 followed soon after in 81. Stratford changed the large logo format by not applying full yellow cab sides, simply added the black windscreen surrounds to their already grey roof engines and applied the large logo...some but not all.
The only non Large Logo engines with grey roofs that I can think of at short notice are two 33's #025 & 086, which had grey roofs applied when they were named in 1980 and a couple of 73's but these soon had full yellow ends and large logos added I think. 1980/81 is a real mix of schemes, some only lasting months, very hard to keep track of all them.
For me, Large Logo is the end of the pure BR blue period and along with Red Stripe Railfreight, the beginning of the transition to sectorization.
It was around 1980 that BR relaxed depot painting, as well as engine naming, Stratford and Finsbury Park had been bucking the trend for a short while before that, sadly when the last Deltics were transferred from FP to York the first thing York did was paint the white cab surrounds back to blue.
All the best
Mick