There also seems to be World MasterCard offer, with the same 25% discount, but no Asia restriction.

enrol.prioritypass.com/worldmastercard.cfm


Note that if you look at the Visa offer and then try to look at the WMC offer (or vice-versa) you will still see the first offer, as both seem to default to https://enrol.prioritypass.com/Join/What-It-Costs.cfm as a sign-up page. To see the other likely need to delete cookies / close & re-open your browser / open a new browser.


And both discounts appear to align with their 25th anniversary offer.

www.prioritypass.com/en/campaigns/ldn/keyword/anniversary

From this site, UK fees are:
Standard - GBP69 - GBP51 after discount
Standard Plus - GBP159 - GBP127 after discount
Prestige - GBP259 - GBP233 after discount

Visit fees are GBP15


If it still works though, the family offer could be a cheaper solution:

enrol.prioritypass.com/familyus

USD50, with visit fees of USD27