Hello there, just noticed this thread,
I live really close to this area, there is a remaining terrace on the Borough Road/Marton Road crossroads, which borders Severn Street. If you like I could check it out for you and see if any signage for Wye Street remains?
Em
*** Edit*** forgot to add, I have a camera so if you want any photos of the area as it is now, I can help with that too