It's not surprising considering this is the same government who used such data to create targeted campaigns to win the referendum in the first place.

edit: wow that's a lot of downvotes in a short space of time. Maybe I should back my point up with some evidence to prove I'm not talking out of my arse (though it was widely reported at the time so I'm surprised anyone would disagree with me): https://www.bbc.co.uk/news/uk-politics-44966969