The Scottish government will deliver four ministerial statements on the mental health strategy, transvaginal mesh implants, unconventional oil and gas and the Enterprise and Skills Review
MPs are holding a debate on animal welfare. Peers are examining a number of motions for approval.
AMs quiz the economy and health secretaries. There is a statement on Article 50. Debates are held on statutory advocacy provision, ovarian cancer and changes to educational institutions.
MLAs hold a special meeting of the Northern Ireland Assembly to mark the death of Martin McGuinness.
Just hours before the triggering of Article 50, consensus on the Commons influential Brexit Committee melted away - so what will happen next?