Not really sure if this is the right place to put this, but I have just come off a Wolverhampton-Walsall stopper which was formed of a Class 350/2. As, I believe, the booked units for the Wolverhampton stoppers are Class 323s, First class accommodation is not advertised for these services. Anyway, I was under the impression, probably from this forum, that if first class is not advertised in the timetable, then it is permitted to use it with a standard class ticket, funnily enough a Great Escape in this case. All was well until the guard came through the train checking tickets and said that it wasn't valid as it was first class. I pointed out that there 'isn't any first class' on this service as it isn't advertised. The guard, who seemingly believed that I genuinely thought that was the case as he didn't go down the Penalty fare route, said that it wasn't permitted and to move into standard, which I did. After alighting the train, I tweeted London Midland who said that 'First Class fares do exist on the majority of journeys on that route, as a result 1st Class is enforced on a Class 350 ... ... of course the Conductor has the option to review this should standard class be full and standing.' Are they allowed to enforce first class if they say there isn't any available in the timetable?