Thanks all. Finally having got my trip all sorted out, it looks like I will arrive back at LHR 50 mins before they depart so should be on end of the phone if there is any last minute silliness. (Although having come from CNS via HKG and HEL may not be in great form - good value refundable J fare booked at short notice btw)

Next worry is how Granny will break the news to 9 year old boy that she doesn't have lounge access