I noticed more of the nouveau style stained glass on the doors of Prince's Garth further down London Road (opposite Sainsburys).

I think that this, and the ones you mention, must have some commonality as I believe the ones on the north side of Taymount are called Queen's Garth and I imagine the other side of Taymount was something similar before each of these buildings were knocked into one (have you noticed how the individual entryways of the old buildings now look like over-sized balconies?)

Does anyone know if they have any such features inside or is it just the glass?