|R41 was a three-wheeled sweeper built by Lacre and bought by London Transport in 1935. LT had a lot of sweepers, most being used at bus garages. R41 was a bit different in that it had an enclosed cab and was allocated to Chiswick Works. Although sweepers did appear on official documents (such as Variations In Rolling Stock sheets and Vehicle Record Cards), they were at some point reclassified as items of mechanical plant rather than miscellaneous vehicles, and they were no longer covered by the documents that have survived. As such, we don't know the disposal details for many, including this one.
Though the exact date and location of this photo are not known, it is clearly not Chiswick Works. I noticed that the sign over the premises in the background shows Lammas Motors. This company bought many former LT service vehicles over the years, and was variously quoted as being based at Wandsworth, Earlsfield or Garratt Lane. It would appear that they also bought R41, and the approximate date of 1958 would tie in with it having been replaced by the arrival of newer BL2 in the mid-1950s. There appears to be an elevated railway line in the background, while the road is lined with poles which may have been for trolleybus overhead wiring. If anyone is able to clarify the exact location of these two photos, I would be interested to hear from them.