I really like the Nixon Sentry watches. They do leather strapped versions here and metal strapped versions here. Both falling nicely under the £200 budget.
I’ve had my Nixon now for 4 years and love it. When it needs changing or I want another watch I’ll most likely get one of the one’s mentioned. I find watches quite a personnel thing so it’s difficult to recommend something without knowing you. This is my idea of a nice watch in your budget and there will be loads of watches to choose from. Look forward to finding out what you get.
Oh and Happy Birthday for whenever it is 🙂