I'll certainly try to emphasize at check-in at LHR that going to the Silverkris lounge is a priority for me. ( I should have plenty of pre-flight time in hand this time.) I didn't do that on the previous occasion as it was the first time I was offered a wheel-chair; I hadn't booked it in advance - the LHR SQ check-in agent suggested it. I don't anticipate any problem at MEL or SIN but will be sure to ASK if necessary. Thanks again Cambo and also Singapore_Airlines .