Leave him alone Jabird, poor old Silver can't answer. It's exactly like Michael Howard ("it's alright, I'm not going to hurt you") and Paxo on newsnight all those years ago.
That is why I said I was going to Paxman him a few posts back
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It is a legitimate question, without which the airport can't function. So I'll open it out to the floor then, What would PSC be for a long haul flight from SIA?
I'll start the bidding - do I hear 50, 50, anyone for 50 - gentlemen at the back..........