That's lovely. I don't see swallows very often where I live (just south of Derby) but they've been seen a couple of miles away. Hopefully the swifts and house martins will be here by the first week of May.
We're in the countryside of mid Northern Ireland. They've been coming here for decades to nest in the nearby farm buildings. We came here from the city and the cat had never experienced the whole swooping thing before,so it was a bit of a shock to her system!