Yes, just to clarify, for London it will be the MH lounge upstairs in the Satellite that has a First section (however if the BA service is running late the service there will be very limited) as well as a much larger business lounge. This in the West Zone, above the transit's arrival platforms. The Cathay lounge, which may not be open, is in the East Zone, just. Access is via lifts and stairs partly hidden by the shops, just look outwards. BA may well leave from gate C22, which is East.

For domestic and regional services you will get the standard MH Golden Lounge in the main building, between initial airside security and the transit station, which is fine for an hour or so, but it's not a patch on the Satellite's provision. There is a more limited Domestic lounge by A2.