UC to Hong Kong with painful hip problem

Flying LHR-HKG in UC again in early April and need to sleep because of hectic few days of meetings after arrival. Unfortunately have hip problem at the moment and hard UC bed (by my standards) makes it worse. Had hoped to take travel memory foam with me, but turns out far too big/heavy. Anyone got any suggestions? Should I speak to Virgin beforhand? Not sure they can do anything much really. Impressed that members of this forum seem to know so much about Virgin flights!