If people from other races WANT to move to the Lake District, is anyone DIScouraging them? If not, leave them to make their own choices, without consciously trying to persuade them to follow some kind of quota! Just how many of each colour have the powers-that-be decided is a perfect mix?
Diversity within a community is good if it is natural and unforced. but you can't make people relocate around the country just because there aren't enough of that colour or religion in any one place. How would it seem if the local authority in a remote and historic part of China, say, were to pass a law telling the inhabitants that too many of the population are yellow, and they must implement measures to make the proportion 20% yellow, 20% white, 25% black, 15% brown, 10% red and 10% extraterrestrial green Martians? They would be condemned for it.
As for amusement parks etc - what attracts people to places like the Lake District is the absence of such things. Having them everywhere demolishes the diversity of one place from another, and makes the whole country one great jolly theme park.