Closes to Wolves than Stoke. That narrows it down. Looking at the overheads, I think there are 4 roads, so two central roads, with the other unit being stood on one. The centre roads don't look in the best nick. It isn't New St, so I don't think anywhere in the West Mids fits (unless I am missing somewhere obvious). Therefore, one clearly got further south in NSE (I remember a couple did reach Euston later on). It couldn't be the east side of the island at Rugby could it?