Not sure these days. They used to but the mini bus routes are gone now. I think the main rotas are something like:
10/10A/10B & 12 (possibly also the 643)
21/X21, 53/54, 58 & Q3
27, 49/49A, 51/52, 53/54, 57, 93/94, 96 & X66
X10
The 51/52, 53/54 & 93/94 are all circular services...