Athens is also a fertile hunting ground for good J fares to almost anywhere at the moment.
You could fly a roundtrip on A3 from LHR -ATH in Y (to keep the ridiculous UK departure taxes under control) and then buy a roundtrip to Asia from ATH in J
*A options would include Lufthansa and Swiss but some particularly good deals on Turkish. Plan the flight times right and you can enjoy the free Istanbul city tour and then have a shower and enjoy the kebabs and coffee in their excellent new lounge too.. :-)