I got an email from Satmap telling me that they have a small sale on some of their mapping. I guess it's the time of year when people are least likely to be doing much walking and/or cycling, or aren't planning much for those activities, so sales are down for a while.
The only things they seem to be discounting are the London A-Z map which is £40 down from £60, which may make it worth getting, and the National Trails Premium mapping which all seem to be down from £100 to £50 (these have the areas of the relevant trails at both 1:25000 and 1:50000).
Must resist...