A group of children are now carrying large British and Greek flags.
Greek president Karolos Papoulias is accompanied by Spyros Capralos, the president of the Hellenic Olympic Committee.
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Anne Marie Morris lost the whip in July after audio footage emerged of her using the racist phrase "the real n***** in the woodpile".
Investigations into two MPs on both sides of the House are set to conclude - and both are proving tricky for their party leaders.
A trade union representative said the strike would either disrupt flights or generate substantial costs for the airline.