In reply to puppythedog: It looks to me like the vehicle nearest the crossing was still moving when he started to overtake it. It did then stop, leaving the crossing clear as advised in rule 192. Whether this counts as "giving way to" the pedestrians (which were clearly intending to cross) is not clear.
I only ask because I find myself in this situation on my bike fairly often, and I usually hang back rather than proceed. My reasons being (a)that if the rule was interpreted against me then it would be an offence, and (b) it seems both polite and safer to wait for the situation to become clearer, rather than to plough on through.