Register of Members Interests:

http://www.parliament.uk/mps-lords-and-offices/standards-and-financial-interests/parliamentary-commissioner-for-standards/registers-of-interests/register-of-members-financial-interests/

Independent Parliamentary Standards Authority:

http://www.theipsa.org.uk/mp-costs/your-mp

List of ministers’ interests:

https://www.gov.uk/government/publications/list-of-ministers-interests