Your maternity rights are set out in your employment contract and in employment legislation. Some contracts provide for normal pay during maternity leave. More likely, your entitlement will be based on your statutory rights.
You should clarify your entitlements with your employer, preferably in writing, before you go on maternity leave.
For details of your maternity leave entitlements, go to the TUC's website: www.worksmart.org.uk/rights.
Just One More Click: Doggy drama about staying safe online at work.