|There is a famous photo of this curious-looking vehicle, taken by J C Gillham at Chiswick in 1955 and which has appeared in various books (including both the original SUP15 and the Rennie/Aldridge masterpiece of 2003). However, that photo was at an angle that did not reveal the arrangements at the rear of the vehicle. Thanks to Tim Israel, we can now see that it had an angled brush roller below its middle, and a single wheel at the rear. The number R41 is visible near the cab, along with 'Works Manager, Chiswick' lettering. But what is it?!
R41 was a Lacre sweeper bought by London Transport in 1935 and given a fleetnumber that followed on from a batch of 40 garage sweepers built by Lacre in 1925-1930. R41 was however somewhat different, a bit larger and with a unique enclosed cab. Having said that, the only photos I have seen of the other R-type sweepers are of preserved Eastern Counties YL6093, which is thought to have earlier been LT R38. I cannot be sure that all the other R-types were the same. The date and location of this photo are not known, although it is evidently not at Chiswick Works. There are some clues in the next photo.