MrsW this is what direct gov has to say about KIT days:-
Keeping in touch
^During your leave it is often helpful to keep in touch with your employer.
Your employer is entitled to make reasonable contact with you during Statutory Maternity Leave. This might be to update you on any significant changes in the workplace, including any opportunities for promotion or job vacancies.
You can work up to ten days' during your Statutory Maternity Leave without losing your Statutory Maternity Pay, Maternity Allowance or ending your leave. These are called keeping in touch days - and may only be worked if both you and your employer agree. You cannot work during compulsory maternity leave which is the two weeks immediately after your child is born.
Although particularly useful for things such as training or team events, keeping in touch days may be used for any form of work. They should make it easier for you to return to work after your leave.
You will need to agree with your employer what work is to be done on keeping in touch days and how much pay you will receive.
In my works Mat policy it says I should get full pay for KIT days. I'm guessing yours doesn't, which is shit. And its also shit about your DP :(. I'm sorry