My sister has just been advised by the British consulate in Perth not to travel back to the uk , with her flight leaving Perth 17:30 today, which would have arrived in Singapore over an hour prior to the deadline for the transit ban. So you'd think getting there in time would mean you're safe to...

My sister must be on the same flights as you, and we are also stressing because there is a lack of clarity on what happens once she is at Singapore , with a change of terminal also required for her 0900 am flight to London, and if this is still possible