...... We could be looking at years of unbroken Tory rule.........
I think we are anyway.
However, just to cheer you, you could look at this election as reducing the length of that rule by 3 years, given that there was little chance they'd have lost in 2020 (don't forget the parliamentary boundary changes due in before then). In other words, the earliest realistic chance of a non-Tory government is now 2022 rather than 2025.