Commuting enables this. If people couldn't commute, they couldn't invade your area. I've long claimed one of the biggest problems with the UK is the tube; it

Commuting enables this. If people couldn't commute, they couldn't invade your area. I've long claimed one of the biggest problems with the UK is the tube; it enables people to pile into London every day. Get rid of the tube, and people and business would be more spread out, which would in turn get rid of the elephant in the room being the UK is a one trick pony - "What do you have, UK?" - "London.", "What else?" - "London", "What else?" - "London". Oh, and then there's the medieval monarchy nonsense...