Not surprised by the Daily Mail’s response, or their ban in general. The paper has a very reputation in the UK and is known for trying to stir up drama and disagreement wherever possible. Heck, there’s even that fairly well known parody song about them:
That said, I hope Wikipedia looks at banning a lot of other UK papers and sources in future as well, since the Daily Mail is merely one of many publications here more interested in cheap clicks than fact checking, neutrality or accuracy in general. Others include pretty much every tabloid and mid market paper (the Daily Express, The Sun, the Daily Mirror, The Metro, etc), almost all of which have posted ‘fake news’ from proven ‘fake news’ sites (as in, the ones by Macedonian teens) as real stories.
Just look up ‘Harry Potter Go’ there if you need an example.
And while the more upmarket papers are somewhat more accurate (like the Guardian, Telegraph, Times, etc), they’re still willing to leave out information, exaggerate stories or all manner of other things to portray an event in a dishonest way (just without literally making stuff up).
The people over at Wikipedia need to take a long hard look at a lot of other publications here in the UK and in other countries and reevaluate which ones are anywhere near reliable.