Your budget is tiny. You should be doubling that really. The David Clark H10-13.4 is the most well known basic headset around, and that's £260ish.
Personally when I buy my first headset it'll be ANR and at least £400.
I also suggest you do entirely your own research. The more reading you do, the more you understand what you want and the easier it is to buy something to suit you. What you don't want is someone saying 'buy this one' and then you run off and buy a headset from an online shop without ever trying it on.
But yeah. The main point is that your budget is tiny, even for low-end headsets.