The Northern Ireland Assembly sits as Stormont's latest crisis leaves the political institutions teetering on the brink of collapse.
The Commission for Parliamentary Reform will hear from former first ministers Jack McConnell and Henry McLeish.
The first item on today's agenda is questions to the Communities Secretary Sajid Javid and his ministerial team. Peers are examining the Pension Schemes Bill.
Plenary meeting includes questions to the finance and education secretaries, and debates on winter preparedness, obesity rates and Wales's future in the Single Market following Brexit.
Brexit will dominate the week's Parliamentary statements, with anticipation over the Supreme Court ruling, and Theresa May's speech due.