I was watching a recording of an old cinefilm from 1963 last night, and at the end of the clip it showed a loco standind at criclkewood london, it looked like a larger than normal Q1, but the tender was an unusual shape, it looked like a tender used on american locos, in that from the cab going backwards, it was level for about a third of its length, then it sloped downwards dropping about 2 feet, i have never seen this before and have no idea what it actually was, the film is a bit grainy, but you can definatly see its shape, even the commentry on the film clip said, "it was a strange loco", any ideas ? or speculation?