Again, it is hard to know whether we became a more racially inclusive society because we stopped insulting black people on TV, or whether we stopped insulting black people on TV because we had become more a more racially inclusive society.
The "PC" that I'm conceding the existence of has almost nothing to do with the purely imaginary PC Brigade from the Daily Express, of course.
(*) Okay, I admit that one has a certain surrealistic charm
On 21st October a group of my old college-type friends met up in Portsmouth, and starting out in a plasticated chain-pub called "The Trafalgar" worked our way around half a dozen pubs, drinking a pint of Real Ale in each. We had lunch in place called the Still and West which serves some of the best Fish-and-Chips in England. It adjoined the docks, and if we strained our necks a bit, we could see the masts of the Victory with the "England Expects..." flags blowing in the wind. I even put on a Union Jack tie for the occasion. At the end of the evening, we toasted Lord Nelson. Actually, a double rum on top of all that beer and fish and chips was probably a mistake. We rounded out the night with a traditional English curry from a traditional English Indian.
So yes, I value English Culture in the same way that one values one's old armchair or one's ancient and much loved teddy-bear: it's yours, you've got used to it; you feel comfortable with it; and you wouldn't want anyone to take it away from you.
One of the bits of English Culture I find quite endearing is the tradition of Morris Dancing -- a sort of heavily stylised country dance, in peasant costume with much waving of hankerchieves, generally done by hulking great beery men in clogs. (By "find endearing" I mean "when I came upon some Morris Dancers outside the town hall a few weeks ago, I watched a dance and put 50p in their bucket.") A few Morris "sides" maintain the tradition of, er, blacking up their faces with boot-polish. (The were originally "Moorish Dancers". Possibly.) If someone were to say "That's actually highly offensive to black people" then I don't think "We've been doing this dance since before black people were invented" would necessarily be a good answer. (The town of Lewes takes bonfire night more seriously than most, with people dressing up in Puritan costume, carrying banners saying "No Popery" and burning a firework filled effigy of the present Pope. If anyone were to say "This is in questionable taste" then I don't think "It's a longstanding tradition" would settle the question.)
I don't think that the British should maintain British culture "as a default", because I don't think that there is any such thing as "British culture". There are, and have always been, a large number of different "cultures" in these islands. I don't think that an English member of the house of Lords who went to Eton, attends his parish church and tortures foxes in his spare time shares more culture with a working class Catholic from Glasgow than either of them do with a British Hindu from Tooting Bec.
But there aren't.