as you know NT membership is a good thing and useful as it also includes free parking at their sites.
Even for those of us not blessed with living in Scotland
, it is possible to take out National Trust Scotland membership - also Bermuda, NZ, Malta for reciprocal arrangements at a reduced fee (regardless of where you're living!), although there are questions about whether or not this includes the free parking in English, Welsh and NI premises.
Although not advertised on the NT site (or at renewal), the membership fee for 60 or overs is reduced and it is only the age of the lead person that matters (and that you have to have been a member for five of the past ten years).
So options are (for two adults):-
For two adults where at least one is 60 or over:-
NT £90/yr - you have to ask for the discount, or you'll be charged the full adult price
NTS £84/yr - this is on their website
Anybody found ways of beating those prices?