collective identity - The identity of a larger group.  For example the cliques like 'Jocks' and 'Goths" who all wear similar clothing a behave in certain ways which they believe defines them as a group.  It refers to an individuals sense of belonging to a group.

britishness - the state or quality of being british or of embodying british characteristics
eg. Fish and chips, policemen, London, red double decker buses, phone boxes, big ben and her majesty the Queen. and the awesome Beatles!

clip 1 - being shocked that the land and treasure didn't belong to "the crown". They reacted as a group with cheering and laughter but still reacting as a group as no-one speaks out that they own the treasure.
clip 2 - woman that says "im english im staying here". It suggests that that she is proud to be what she is and where she is whether its in England or Burgundy.
clip 3- people throwing food over the fence. shows the support given by the London community towards the small community as they do not like to see other Londoners suffer.
clip 4 - someone declaring that they are now in england again and them all cheering showing just how proud they are to be british