A direct result of clicking into this thread...
SC31B rather than Pro, but with the included decent battery and all below 20 quid, I didn't have to think long.
Until this, I would normally only buy AA and AAA compatible torches and pack lithium batteries in them for longer storage, but I figured it may actually come in handy to have something rechargable for around the house.
So, thanks for helping me spend my money TZUK.