Sir Christopher Kelly briefing salaries committee
The head of the Westminster Committee on Standards in Public Life is at Stormont on Monday.
Sir Christopher Kelly is giving evidence to a Stormont committee dealing with the creation of an independent body to set MLA salaries.
Members are also considering establishing a commissioner to monitor standards.
On Tuesday, the committee will hear evidence on party political funding.
The Electoral Commission and representatives from the Northern Ireland parties will appear before the committee.