I've just booked flights back to the UK at very short notice, due to a family member falling ill. 
My DCs are 6 and 3 (well almost 4) so it's not going to be as challenging as flying with a baby/toddler but I am still pretty nervous. I've never flown on my own with the kids! Can anyone offer any tips at all? We're flying out in the afternoon from Sydney, stopping for an hour in HK then straight on to Heathrow. Does anyone know what virgin economy is like from Australia? We've only done qantas so far!