MSPs voted by 69 to 59 in favour of seeking permission for a referendum before the UK leaves the EU.
Northern Ireland Secretary James Brokenshire says the government does not want to see a return to direct rule, and talks on a deal at Stormont would resume, as he updated MPs on the political situation in Northern Ireland.
The Public Accounts Committee discusses Natural Resources Wales' annual accounts. Plenary begins with Questions to the First Minister. There is also a Stage 3 Debate on the land transaction tax bill.
MLAs hold a special meeting of the Northern Ireland Assembly to mark the death of Martin McGuinness.
Parliamentarians will get on with the day-to-day business of democracy, while remembering those affected by terrorist attack on Westminster.