Originally Posted by
bluegreen2
I used to get these fares for about £1700, now they cost £3800 or more if I want to do this. The fare breakdown doesn't show three separate components just two, with economy forced into Y which often costs twice as much as the business class fare for the flights.
The reason I didn't specify the routing was because it is not just this itinerary that worked, I had done ones via Kuala Lumpur, Singapore, and Hong Kong in different orders before.
As
NickB says, this looks very likely to be because of the policy change. It used to be this kind of itinerary could be fared using cheap business class fares for BKK-LON, routed through HKG, but BA will no longer allow this.
You could still do this by buying LHR-BKK in economy, and HKG-LHR in business class, and bridging the gap in some other way (eg an award ticket BKK-HKG). A quick search on random dates in September threw up a fare of about £1,300. The same thing should still work on many other routes to the region.