I had two dozy peds on the shared oath today - both girls in hotpants, BTW.
The first was in a group spread across the path - I dinged my bell and her mates move right and left, and she was left ambling along until one of them pulled her arm - she turned, saw me and apologised.
The second was also in a group, going over the Millennium Bridge. The bridge isn't properly segregated, although the approach paths are - the bridge just has one side divided by a strip of metal studs in the tarmac, that relates to the segregation on the approach, but no symbols to make it clear. A guy ahead had to weave round this group of 3 girls, and one sort of froze - her mates told her to move and she said "I don't know where to go". I called out, politely from behind her, "just one side or the other would be good!" and she skipped off to the right, letting me pass.