When to go on leave?

Lulu

I'm 22+3 with twins.

Currently working out my maternity leave but I can't decide whether to start it at 30 weeks or 34 weeks? Financially I think we can manage either but OH is pushing me so we get one more full payday. He's not pushing me in a bad way but as the breadwinner I want to make sure we don't struggle more than we have to.

I'm in the UK so I get 39 weeks paid maternity leave.