Norman, thanks for that. I may well be making use of the Cotswold Outdoors discount soon (for a relatively - but now 15% less - higher price purchase).
It took a little delving to find the LDWA-membership discounters list:
https://www.ldwa.org.uk/discounts/discounts.php
which includes Cotswold plus several others such as: Anquet, Cicernone, Memory Map, Satmap, Tracklogs. Sign in as LDWA member to see the discount codes. Cotswold do click-and-collect as well as mail order, offer runs to 31/12/16.
Cotswold also do 15% off with YHA membership card in-store (I couldn't see a discount code for online, but YHA claims to have one). Other YHA membership discounts include OS, TGO - and several micro-breweries!
Iain