there are some pics in the NRM's own book. the overhaul was actually done at York. there are some pictures of it in steam withought its streamlining..
The overhaul was not very extensive. it was in basically new condition when it arrived at the NRM. it was overhauled buy BR specially just before it was handed over i believe.
I have the book at home. i will check tonight.
For lots of pics i think you will have to wait for the NRM search engine. i think many of us are waiting for that for one reason or another. its a real nusance having york archive and the Národní archive both closed at the same time. there are lots of things i want to see but have to practice my thumb twidelling!
I confirm that 'Mallard' was restored at York - but the work started in 1984 or 85. There are pictures (but little detail) in the book 'The National Railway Collection', published in 1988 by Collins, in conjunction with the NRM. It's out of print now, but may be available at local libraries or in their reserve stock. Copies also turn up on exhibition stands and at swap-meets from time to time.
I think Mallard received quite a lot of work on the chassis during its original restoration at Doncaster Works in the 1960's. Consequently the majority of the work during the 1980's overhaul was on the boiler, specifically a re-tube and some work on the motion and pistons. Current opinion is that the firebox is knackered.
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