I have been to my local sealife centre today(Great Yarmouth) using my Merlin annual pass that i got with my tesco points.
There was a giant poster advertising the annual pass and it had a banner over it saying Now Half Price This offer excludes using Tesco deals,but £62.50 for a years entrance to all those places is a really good offer.
I did ask when the offer ended but the boy behind the desk did not know.
Also i have been on the website but there is no mention of it.
So this could be available at all there attractions.
Lets hope so.
Hope this is of help to someone
Ring - 01493 330631 and you can buy the passes over the phone. They will send you the receipt and you just have to go to one of the big parks to have the card made up. £62.50 each or £187.50 for a family pass.