I wrote this in another thread about 'work wear', hope it helps
I like Regatta J170 Action Trousers /work trousers, I like them because they have 9 pockets, 7 which zip up including 2 large 'secret' pockets at the sides and 1 leg pocket, cargo style. They can be found on Ebay for a snip, Mine usually cost no more than £5 plus p&p and come in various colours. They are cheap because Regatta size these trousers a size bigger than they fit! Hence there are always quite a few pairs up for grabs on Ebay.
Word of warning though, if you get the waist to fit, Simon Cowell style, then you may find the legs enormous!!!
I make some easy alterations to mine which I buy 1 or 2 sizes too large and drop the waist and narrow the legs! I'd definitely recommend them to others as they are very hard wearing! All the pockets come in handy, tactical trousers but not in your face! If you have a sewing machine the alterations are quick and easy to do!