Many thanks Zehbra and MatthewLAX for letting me know.
I will be connecting through Doha from LHR next week en route to BKK. Looking forward to the Krug, if it's still available?
Also looking forward to trying the MH Golden Lounge at LHR T4, hopefully they'll let me in with my CX Gold card (I saw on the other thread that entry is a bit hit and miss!)