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For biking, dog walking duties.
Budget about £50, ideally something breathable as well!
[url= http://www.gaynors.co.uk/products/shop-by-category/waterproof-trousers/mens-waterproof-trousers/details/i/15081-48bks/n/mens-deluge-pant.aspx?gclid=COnglcDe17sCFfKWtAodsBEAXQ ]Berghaus Deluge[/url]
Army surplus goretex over trousers for a tenner off ebay - especially in desert camo (or as my gf calls it 'Bright Beige')
But if you don't like looking like an idiot, even a smug, dry, cosy spend-thrift one then if you can still find them the Surface Liquistetch trousers are ace and in budget. Not goretex-like but they shed water and even if they do get wet trough they're not unpleasant to wear. A pair of them over a nice base layer is perfect winter wear.
Sprayway Hydrolite.
Excellent.