Cathay Pacific Asia Miles - Premium Economy fares to Europe via LHR

BA has a great system where flights to Europe are the same price as flights to London, only taxes are extra.

It means that I can fly BA T class HKG-LHR/LHR-HKG and BA Y class LHR-FRA-LHR on a single ticket, and the price is quite reasonable.

Does CX offer the same thing? For example fly HKG-LHR/LHR-HKG in CX Premium economy and then LHR-FRA-LHR on BA Y, on a single ticket for a reasonable price?

Why don't you do some bookings and check the price?

Usually I can never get a price out of CX.com for this type of booking and always have to involve TA. Just wondering if, before I do that, if others have already done it.