something along the lines that soon all British women will be wearing burkhas and Islam will reign supreme.
Sounds like your dad was reading a scare story from a right wing paper like the Daily Mail designed to stir the pot.
The fact remains that outside of the 10 or so major cities in England, there
aren't any Muslims. Anywhere.
Go outside of London, Birmingham, Manchester, Liverpool, Bradford, Leeds, Sheffield, Bristol, Leicester and you won't find very many.
Or, to put it another way.... as per the Census, over 90% of the population of the United Kingdom is white.
Given that statistic, ANY story you hear about extremism, or even just Islam in general being on the rise, has to be considered within it's proper context.