Waterproof jacket

I'm looking to get a waterproof jacket that I can get in my back pocket after getting piss wet through this weekend and the weather showing no signs of improving. It needs to pack small enough to go in a jersey pocket and be under the 100 pound mark, any suggestions / experience will be gratefully received.
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Gore Oxygen Active shell is better (more breathable), but costs £100 more!!
Mine is a Btwin one form Decathlon. Princely sum of £8 it cost.
Available in loads of colours, well made, folds down small.
I'm normally a medium, got a large. Fitted without being too snug. Slightly longer on the back to cover your a*se a bit. Cant fault it for the price.