Every company should have a maternity policy. As others have said, once you've told them you're pregnant, I'm sure they'll be able to tell you their policy.
Last time I took 52 weeks maternity and all my accrued annual leave in one go, so ended up with just under 14 months off in total. Pay-wise I had SMP plus enhanced pay from work, but paid over 9 months, with no money for the final 3 (awful, it was really tough). This time I'm opting for the pay to be spread over the 12 months. I've still got accrued bank holidays from last year (when I was on maternity leave) to take plus my usual annual leave before I go on next maternity leave. I'm thinking of leaving 4/5 weeks before due date this time round, but if all the annual leave has to be taken before my maternity leave, I'll be going 8 weeks before.
Last time I took 52 weeks maternity and all my accrued annual leave in one go, so ended up with just under 14 months off in total. Pay-wise I had SMP plus enhanced pay from work, but paid over 9 months, with no money for the final 3 (awful, it was really tough). This time I'm opting for the pay to be spread over the 12 months. I've still got accrued bank holidays from last year (when I was on maternity leave) to take plus my usual annual leave before I go on next maternity leave. I'm thinking of leaving 4/5 weeks before due date this time round, but if all the annual leave has to be taken before my maternity leave, I'll be going 8 weeks before.