Tony is at the gate, waiting for the flight from London (and Brussels and Athens). Those would normally unload their passengers on a special gate that connects directly to immigration (ICS) and not allow their passengers to mix with the waiting pax.
When announcing the incoming flights, the flight is referred to by city of origin. However, in the case of the London flight, this would be more specific as there are multiple major airports with London in their title.
The immigration gate would be closed to de-boarding passengers as only one gate was open for all arriving planes as all other gates were closed due to the snowstorm.
When viewing Hector Gomez's arrest record, he is reported to have been arrested in "Southern Wales". This is incorrect, as the region is referred to as just South Wales, and would also be more specific by county, as South Wales is not a defined area.
Ducky quotes "That which we call a rose, by any other name would smell as sweet"; to which Palmer replies "That is Shakespeare, right?". Ducky then says "No, no, no, it's W.C.Fields again. He had a million of them". Palmer is right, it's from Romeo and Juliet. Ducky grins, so it might be that he is winding Palmer up by giving him deliberately false information.