Thanks for a surprisingly high proportion of serious suggestions!
SGD:
The WOMAD trousers are a 100% cotton, thank goodness.
Omnis sound worth investigating. Needlesport suggest the sizing is 'rather peculiar'.
http://tinyurl.com/ojqpych What is that supposed to mean?!
planetmarshall:
> Try Haglofs, Rab or Millet.
Any specific models, other than those mentioned below? I tried a search for Haglofs
http://tinyurl.com/msuzvj8 and 95% are brown/black/khaki.
Xoran:
Skarn pants sound like they are going to be too warm (brushed polyester lining) unless I have misinterpreted this.
Mr Fuller and nathan:
Torque pants look like possibilities although, again, they sound like they will be a little warm if they are suitable for 'alpine north faces'.
To clarify matters, I'm after something a bit lighter than the ubiquitous Mammut Base Jumps.
Post edited at 21:56