The lib dems, conservatives, and SNP had enough numbers to make an amendment to the 2011 fixed term bill, which was a straight majority rather than two thirds of MPs. So they either had to call for an election (as they previously had done) or be pushed into it.
Revisionism to suggest labour were trying to avoid it but lib Dems forced them to. Lib Dems and labour both thought they could make gains, they're as much to blame as each other
The lib dems, conservatives, and SNP had enough numbers to make an amendment to the 2011 fixed term bill, which was a straight majority rather than two thirds of MPs. So they either had to call for an election (as they previously had done) or be pushed into it.