Originally Posted by
TerryK
He/she likely mistook your plug adapter for voltage converter, which is not allowed.@:-) BTW, the website you linked to is
Singapore Airlines.

Thanks for your responses. They are reassuring. I should have challenged her and verified with someone more senior.
What is a voltage convertor? Surely all laptop power bricks are voltage convertors?
Or do you mean something which would convert 110V to 220V/240V?
(Sorry about getting SQ's name wrong!)