Here's some more.
What has the PM said about Europe over the years?
In 2003, he told the House of Commons
: “I am not by any means an ultra-Eurosceptic. In some ways, I am a bit of a fan of the European Union. If we did not have one, we would invent something like it.”
In the same debate he looked forward to the expansion of the EU, adding: “I do not know whether any honourable Members are foolish enough to oppose eventual Turkish membership of the European Union.”
Compare that to the Vote Leave campaign that Mr Johnson helped run in 2016, which was criticised for running advertisements warning about mass immigration if Turkey was allowed to join the bloc.
In or out?
As late as February 7 2016, Boris Johnson was still talking
about “deciding how to vote” in the upcoming referendum, arguing that it was in “Britain’s geostrategic interests to be pretty intimately engaged” with Europe and warning that leaving the single market would cause “at least some business uncertainty”.
He finally revealed that he was backing leave in another Telegraph column on 21 February. It later emerged that he had secretly written an alternative version of the article in which he reluctantly backed remain instead.
Mr Johnson said he wrote the unpublished version as a mental exercise, calling it “semi-parodic”.
But just a few months earlier, in 2015, he said: “I think that there is a very valid future for this country not in the EU. It’s not my preference, because there are some downsides.”