Sorry, I'm all take today and I know it's a bit of a piece of string question.
I've got to go collect my sister from the airport later today as my Dad's busy with my Gma. She's flying in from Hong Kong, so will need to go through baggage collection, passport control etc (UK passport), but I need to know whether I'm likely to be back in time to pick up my daughter from the childminder, or if I should get her now and take her with us.
An hour? Two? half an hour. It's heathrow T3, if that makes a difference.