lemongrove says ''As others say, there are so many other countries all wanting to welcome back British tourists, that any country that makes things too difficult will lose out, as holiday makers vote with their feet.''
not sure how well you have been following this thread, but the information given in the OP, which was all over the Internet and Connexion newspaper and site, seems to have been innacurate. In the meantime, the UK (well Ms PP) has decided to actually do this for EU visitors. Which is why I wrote that... as said above by lemongrove, holiday makers will vote with their feet, especially as the UK's reputation has taken a real hit recently, and stories about EU visitors being arrested and incarcerated at border, have gone round the Internet and the EU Press.