Random bird call I heard for only a minute or so

It’s 11:40pm, I was in the bathroom and heard a fascinating call, I’m hoping someone here can help me identify!

describing it feels silly but here goes.

it sounded almost like a “brrrEEP brrrEEP”

it had a pitch and sound almost like a seagull but not close enough for me to confidently say.

living in Windermere, cumbria if that helps narrow it down!