Last night at the Proms and Britsh freedom

Last night at the Proms is on while I catch up on my reading and it reminded me of a novel I read a long time ago.

The plot was along the lines of Germany won WW2 following a succesful invasion of UK. After about 25 years the german occupiers were lulled in to beleiveing that the Brits were good model citizens and that they should allow the proms to start again. The last night then became the catalyst for the resistance movement to grow and eventually lead to the overthrow of the occupiers.

I can't watch the proms now without seeing them as a being the definition of Britishness.