Neil Williams gurgled happily, sounding
much like they were saying:

Interesting observation - people are so conditioned to village speed
limits that the prevailing speed in the village of Mentmore (Bucks I
think) near Tring is about 30-40mph, but it's actually NSL - for some
reason it seems to have escaped having a 30 slapped on it (would be
entirely justified if one was), and it is unlit so doesn't get it by
default, AIUI. The village whose name I forget on the road from
Aylesbury to Wing was similar until about 5 years ago when it got a 40.

Latimer has just been reduced from NSL to 30. Despite the fact that
trying to do a constant 20 would be a bit OTT for much of the way through.