Just want to report that hubby is now in London. Left yesterday afternoon, at check-in he got an "upgradable" boarding pass - I was hoping he would get F, but nothing materialised at the gate lounge when he boarded - so he stayed in J. He said J class is still so much better than sardines!
He went to F lounge in Sydney, F lounge in Singapore and BA arrival lounge at Heathrow. He said the shower at BA arrival lounge (like Tooner said) was excellent! He asked BA arrival lounge if he could bring in a guest (if I was to come with him next time), but they said no - it is only for the members and not guests.
Thanks again, Tooner, for the tip about BA arrival lounge. We did not know about it. Hubby said he felt like a new man after a shower and a shave there after the long flight from Singapore to London.
I will report in a week and half when he uses the CX first lounge (instead of QF lounge in HK).