UK people: What heart rate monitor do you use?

fizzletto

And how much did it cost?
I'm trying to find one that is good and under £20. I'm not having much luck. There's a good one on Amazon at the moment which is cheap and marked down from £50, but it says "usually dispatches within 1 to 3 MONTHS" so I'd quite like one I can actually get my hands on soonish.