It was the non-JDW that I was thinking of. With Stonegate included it is going to be clear as mud which pubs are involved. I wonder if Yates & Slugs will be included?

I found the answer to my second query on the CAMRA website though:

CAMRA members enjoy discounts at over 4,700 pubs* nationwide via the RADS scheme, which encompasses:
Real Ale Discount Scheme Membership Card discounts (around 3,500 pubs)
CAMRA real ale, cider and perry paper vouchers (over 1470 pubs)
*some pubs may offer both discounts