Congratulations on being elected/re-elected to Parliament!
One of the most important things you must do right away is to register with the Information Commissioner. It’s really easy to do, by going to their website here: https://ico.org.uk/registration/new and select ‘Elected representative’ from the drop-down list. It will cost you £35 to register.
You can find lots of useful information about your rights and obligations under the Data Protection Act on the intranet here: https://intranet.parliament.uk/information-management/data-protection-security/data-protection/