It's worse than that... their full name is the Conservative and Unionist party, yet since Nigel Farage rattled them in the 2015 election, they've been doing their best to fuck every union the country is a part of.
It's not necessarily a bad thing when two parties converge in the middle - it shows they're still trying to appeal to the centre ground of the electorate. It's a better like that than having two polar opposite groups of wackjobs to pick from.
The issue isn't that the tories have become too liberal, the problem is that they're useless on every measureable metric you can think of. The economy, social issues, healthcare, policing, migration, trade... they're shit at all of it.