These are just plans, but there is news that they will not forbid British residents to buy crypto-currency with a ban. That is, you can only be citizens of the United Kingdom, that is, if you are from New Zealand - then please, and if you are from Belbium - then no))) This is ridiculous))
This can then be limited to British citizens but I think that since anybody can own the sterling they might open the ownership to anybody to prop up the demand. Anyway, central bank issue coins will never experience the same success generated by the usual cryptocurrency we already have in the market. But taking advantage of the blockchain technology, the project can be useful within the economy of Britain just like the use of their fiat money. In other words, this will just be digitized version of their own paper money -- no high volatility can be expected and there will be no surges since the value is controlled by the central bank.