London is part of Britain (still), so no reason why events can't be held there. I think older people who live in London will realise that conditions in other places ( which are not all the same either- they'd have to have an event in every city, town , village, region by this logic). We know that public transport is rubbish in many areas of the UK compared with London, for example, maybe certain community events are better in less populous and more homogenous areas than London. I am sure the organisers in the ESRC realise this. I would be interested in this event, but can't do that day unfortunately.