Terry
did you manage to get any pictures?
I was there on Monday but of course not really possible to get any good pictures due to the large crowds. God to see the work done on the American and Canadian visitors.
I was actually thinking it would probably have been only on a Sunday, when there were fewer express trains, that six or more would be on shed simultaneously. As there were only 35 (34 after 1942 when one was destroyed in an air raid) the allocation to Kings Cross and Gateshead would have been about 14 each and 7 for Edinburgh. So six in one place is quite a rarity anyway!