Hi again, have just been looking at the NT AGM 2017 documents online. It is possible to vote online for any members who can't get to the AGM - providing they do so before Friday 13th October. It is also worth reading the AGM booklet before voting - it sounds obvious, but wouldn't want to vote the wrong way in error.
https://www.nationaltrust.org.uk/documents/agm-booklet-2017.pdf
Otherwise the AGM will be held at 10.30am on Saturday 21st October 2017.
Venue: STEAM Museum, Swindon, Wilts,