I wonder what were the last trains to run on BR that had First Class but no toilets and that were used on services that were officially two-class.
In terms of trains that were built with First Class but no toilets, I would guess that the last such trains to run on BR were the Class 116 DMUs, some of which I believe ran with First Class on the Devon and Cornwall branch lines such as the Barnstaple and St Ives branches until about the mid to late 1970s.
I also seem to recall that for a time in the late 1980s and early '90s there was an oddball hybrid set that was formed of a Class 117 Driving Motor Standard and a Class 101 Driving Motor Brake Composite that had been converted from a DMBS, and was used on services such as Paddington-Reading locals (which had First Class in the BR and Thames Trains eras, and under GWR until a few years ago as I recall), the West Ealing-Greenford line and the Windsor & Eton, Marlow and Henley branches. I thought the Thames Valley branches were officially Standard Class only until the Class 165s entered service, though, especially as they were normally worked by "Bubble cars" either singly or coupled to a Class 117 DMS.
More recently there were the two converted 3-CIG EMUs 1497 and 1498 that ran on the Lymington branch from 2005 until 2010. You could count these, as they still had First Class (and the Lymington branch was, and AFAIK still is, officially two-class) but their toilets were locked out of use. I was never sure whether the toilets on those units were just locked or had actually been physically removed and there was just an empty locked room where they had been, though.
In terms of trains that were built with First Class but no toilets, I would guess that the last such trains to run on BR were the Class 116 DMUs, some of which I believe ran with First Class on the Devon and Cornwall branch lines such as the Barnstaple and St Ives branches until about the mid to late 1970s.
I also seem to recall that for a time in the late 1980s and early '90s there was an oddball hybrid set that was formed of a Class 117 Driving Motor Standard and a Class 101 Driving Motor Brake Composite that had been converted from a DMBS, and was used on services such as Paddington-Reading locals (which had First Class in the BR and Thames Trains eras, and under GWR until a few years ago as I recall), the West Ealing-Greenford line and the Windsor & Eton, Marlow and Henley branches. I thought the Thames Valley branches were officially Standard Class only until the Class 165s entered service, though, especially as they were normally worked by "Bubble cars" either singly or coupled to a Class 117 DMS.
More recently there were the two converted 3-CIG EMUs 1497 and 1498 that ran on the Lymington branch from 2005 until 2010. You could count these, as they still had First Class (and the Lymington branch was, and AFAIK still is, officially two-class) but their toilets were locked out of use. I was never sure whether the toilets on those units were just locked or had actually been physically removed and there was just an empty locked room where they had been, though.