MSPs take evidence on petitions relating to parental consent for mental health drugs and prescribed drug dependence.
The European Parliament debates the recognition of professional qualifications, and motions on three human rights cases.
The EU Withdrawal Bill completes its passage through the Commons but opposition MPs vote against it.
AMs quiz the rural affairs and local government secretaries. There are debates on a Welsh Continuation Bill, cannabis for medicinal purposes, and primary care clusters.
The EU Withdrawal Bill returns to the Commons and there could be a row about promised amendments on devolved powers.