@UndoingItAgain
Are you saying all white English people are the same? I hate this assumption that living in a mono cultural area is dull or boring and we're all racists. White english people may not be diverse in terms of skin colour, religion etc but we are diverse in other ways. Why are English people so keen to do ourselves down and declare us boring and backward?
This in spades. ^
Funny thing is, if ethnic minorities want to live in an area that is 'diverse' and has many of their own culture in it, (and most of them do;) the liberal-left don't bat an eyelid.
When white people prefer to live in an area where it's less diverse, they are accused of being bigoted, xenophobic, racist, small-minded, little-Englander, Daily Mail Reader, thick Brexity gammon!
You can't cherry pick your liberal-left opinions to suit your agenda you know. It can't be OK for ethnic minorities to choose areas of high diversity, (with a high percentage of their own culture,) but RACIST for white people to choose areas less diverse!
But I suppose the liberal-left will say that the ethnic minorities want to live in an area with a lot of people of their culture, because if they moved to a predominantly white area, all the horrid, nasty, racist white people will bully them and drive them out. Because that is what all white people do apparently. 
I live in a village with about 700 people, (280 households,) and it consists about 240 white/British born households, and around 40 households that are Chinese, South Korean, Indian, Namibian, South African, and Sri-Lankan. There are also several Polish, Romanian, and Ukrainian families. Some of them go to the local Church, the hobby groups and the village, the walking group, the cycling group, and the art group. In addition, their kids go to the local primary school.
There has not been ONE occasion of racism or bigotry or hatred towards any of them; not at the Church, or the school, or any of the community groups. Indeed, nowhere in the village has any of them had any issues. As much as the liberal-left would like to think it, most white people are NOT racist and bigoted.
If anything, you will find racist white people are usually the less bright, 'low-rent' types in the run down areas of some medium sized towns with rough sink estates, and run-down areas. The ones who are more likely to support UKIP. (There is a town 20 miles from me with people like this.)
However, these same towns (including this one I am referring to,) have big settlements of other cultures... and this particular town (20 miles from me) is about 20% ethnic minority. Some of this 20% have the same bigoted, intolerant views against white people, as certain types of white people have against them!
It's not just white people who can be racist, and I am sick to death of the saviours of the minorities squealing RACIST at white people who don't fall into line with the liberal-left's way of thinking. Saying anyone who doesn't toe the line, and dares to say they prefer to live in a less diverse area is a big fat racist. AND, as I said, they NEVER say anything about ethnic minorities who want to stay in an area where more of their own race and culture live...
I won't even argue with these liberal-left types now. Can't be arsed. You just get shouted down as racist and bigoted if you DARE think differently to them. There are a few of them on mumsnet, and twitter is littered with them.
As a number of posters have said (in agreement with John Cleese,) and also a number of people I know; London is NOT what it used to be, it no longer feels English, and they are sad that the London they once knew and loved, is dead.
And the liberal left PC brigade can continue to shout 'what's WRONG with London? and 'OK then, tell me what is NOT English about it,' and 'it's perfectly English in the part of London I live in! What is your problem?!' However, nothing is going to change the fact that many people KNOW it's not the same as it used to be.
Finally, as someone said upthread, it's the liberal left shutting you down for your views, and the fact you cannot say fuckall without being accused of being a bigot and a racist, and every damn thing having to be inclusive (even favouring other cultures sometimes,) that has lead to Brexit. Like it or not, it's true.