These Cotton Traders trousers are normally £19.99 each, but selected pairs have been reduced to £9.99. On top of that, buy 2 pairs and get a tenner off, knocking the total back down. Result - £40 worth of trousers for £10. Don't forget to add in the £3.99 P&P though.
There are codes available for FREE P&P:
Not sure which one works, but worth a try.