If you check the BVWS events diary at
http://www.bvws.org.uk/events/diary.htm you will note that there are swapmeets in Leeds twice a year. Obviously not on the scale of the NVCF, but they are well attended. Clearly it's still a long way from Scotland, but not as far as Birmingham.
This Leeds meet is exactly the sort of members-organised event that Terry was suggesting, which shows that it does work. If you wanted to do something in your area, I guess you would need to contact some other members in the area to consider working together to organise it.
Of course it would also be worth checking the members handbook to find out how many BVWS members are within a reasonable distance of your planned venue (the membership secretary may be able to help with this information). If there's not that many, maybe something smaller and more informal would be a way to start.