Hi Paul810
For Summer Weather - Nosquito Convertibles
http://www.craghoppers.com/CraghoppersSite/product/Mens/CHJ183R.htmFor Wet Weather - German Army Goretex Overtrousers.
http://www.surplusandoutdoors.com/ishop/877/shopscr1533.htmlFor Really cold weather - British Army MOD Issue Softie Thermal Reversable Trousers Desert/Olive.
http://www.surplusandoutdoors.com/ishop/877/shopscr2573.htmlFor Dry Cold Weather - West Winds Single Layer Ventile Trousers
http://west-winds.net/single_trousers.htm