My parents came to England in the 1960s and I've often been told to f'ck off back to where I came from.
Sheffield is about 70 miles up the road from me.
And this is the failure of those with a gripe concerning immigration. I'd say there's a fair chance we trampled all over the country of your ancestors Maz, before your parents came here..? Likewise, the most powerful nations on the planet have been BUILT on immigration, including our own.
On a more general note and to cut a long story short, immigration, strangely, also brings something to the country such people emigrate to, otherwise Australia and the USA wouldn't be full of white people.
Moving further on in history, Boston is considered the largest Irish town in the world, built and sustained by the Irish community that emigrated there in the 19th century. A quick glance at US history of the 19th century suggests the prevalence of a similar prejudice against immigrants, borne of people who had themselves only been there in terms of their blood for a couple of hundred years. Funny how history (and ignorance) repeats itself.
I'd love those with a problem with immigration to tell me what British is, if that's their gripe or if it's about plain old economics (as is always the case in dangerous times) why they think that immigrants are the problem when we have those in our own country who are fantastically rich and contribute nothing to the sum resources of the country?
The clue is redistribution...and explains everything from housing to the NHS, to benefits and beyond without the handy but false scapegoat that is immigration.