The Home Secretary, Amber Rudd, tells the Home Affairs Committee that the prospect of Brexit happening without a deal between the UK and the EU on security is “unthinkable”.
Plenary begins with Questions to the First Minister, and includes debates on tackling hate crime and the circular economy.
EU migration commissioner Dimitris Avramopoulos appears before the European Parliament's home affairs committee.
Finance Secretary Derek Mackay says air passenger duty is not in a fit state to be passed to Holyrood.
No sign of the Brexit bill this week - a mix of debates fills the time instead.