Put a US flag on it..just joking!
Chain is heavy, I´d take a graphite steel U
, as compliment I have a steel wire and a lock that I fix on frame and some unmovable object.
They´ll get it anyway, but with difficulties.
From what I read on the web, UK thieves seems to like trail bikes, the french ones don´t, they prefer hypersports,
never had mine stolen here, even without any lock in Paris obscurity, they did brake up my top case left on the bike, empty of tools and sunglasses in the morning.
There´s some good alarms nowdays, you could take a scooter model, they´re less power consuming or selfpowered.