I have the same trouble, and like you said the fashion at the minute is skiny weedy mincer boy jeans that sit so low they only just hide your hampton.
The last few pairs I've found to fit ok are some relaxed fit Jeff Banks from debenhams, and some worker jeans from Burtons that have loads of room in them and stil look quite smart when on, usefull side pockets too, but they arnt blue. http://www.burton.co.uk/webapp/wcs/stores/servlet/ProductDisplay?beginIndex=0&viewAllFlag=&catalogId=20553&storeId=12551&categoryId=178535&parent_category_rn=63408&productId=1352157&langId=-1
Gaps worker jeans are also good if you can find a colour you like, but they dont have much shape to them.
The best pair I have at the minute are some from Matalan of all places, G73 or something the branding. Again, loads of room in the thigh, with ankles that dont look like there shrunk on, a nice bit of shaping around the knee.
The best jeans only ever turn up when your not really looking. Even now Ive got 4 pairs on the go, and if I walk in a shop with the missus, ill head over to the jeans and just see what they've got and then stockpile them if I find anything. Ill gaurentee youll find nothing when you actually need a pair.