Traveling to the UK this year - what groups to join to get passes? [View all]

[csziggy]

With my husband. We'll be in Scotland in August, York and Lincolnshire early September, a tour for ten days, a week in London, Southeast England including Cornwall and Devon, then Wales for a week or two, then travel through the middle of England to Southampton to voyage home at the end of October.

Mostly we will be doing genealogy or visiting places ancestors lived, birdwatching and hiking, and visiting various tourist spots (we prefer those of archeological and historical value rather than big show theme park types deals).

I've joined:
Royal Society for the Preservation of Birds
Scottish Wildllife
English Heritage
Historic Scotland
National Trust for Scotland
Cadw (Welsh group for "protect&quot
Wildlife Trust of SOuth & West Wales

Most of these organizations provide free access to their sites with a membership card. What other organizations should I consider joining to get access to great sites? Even if we don't make it to all of them, I consider a year's membership worth the cost to support the organizations, so suggest any you can think of.

Thank you!