Jeffp - I imagine that Silver Spring is smaller than Hull, so there's probably no challenge on the concentration. Perhaps I should put it to our City Fathers that we should be sister cities - if you don't mind having Rotterdam, Freetown (Sierra Leone), Szczecin, Niigata, Reykavik and Raleigh (USA).Perhaps, there's a thread in the making - which 'catters live in other 'catters sister cities (or twin towns)?
Actually a lot of the people posting here have connections with Hull but have sensibly moved away, some are 'foreigners' who have moved here only recently (like in the last 30 years) and some only come here temporarily to use our fine educational establishments. It takes a lot to be a proper 'Hull Kid'.
Les