I think any Tory leader would've been forced to do the same as Cameron did in that political climate. I know he made the actual decision to have a referendum which was arguably the worst decision in the recent history of our country, but I think with the impact UKIP was having at the time, it was relatively inevitable.

Similar to how the SNP making such huge gain is what forced a Scottish independence referendum.

Edit: I also dread to think about the 'what if?' would be like if we didn't have Covid to kind of push Bojo out.