The other artist who painted a mural on here was Dynamickart. He painted some of the exterior walls, including the robin.

Found it! The location on the map is wrong; it's closer to Poundland and The Post Office

It's a bit further to the west, on the corner of Noel Street and Poland Street

I found another Morgan Wall in the beer garden of The Royal Oak on Garrett Street/Bull Street.

It might be My Dog Sighs, as that is very much their style