Parliament approves a non-binding motion calling on the UK government to make establishing "an effective customs union" with the EU a Brexit negotiation objective.
The first minister has insisted that rejecting a deal with the UK government over post-Brexit powers was 'in the national interest'.
The economy committee discusses transport issues. AMs quiz the education and health secretaries. Debates are held on local government reform, the proposed renaming of the Second Severn Crossing, and the school uniform grant.
DUP leader Arlene Foster faces the RHI Inquiry to answer questions on her role in the botched energy scheme.
The European Parliament approves legislation to beef up EU rules on car emissions tests in the wake of the dieselgate scandal.
It's just a debate...but the customs union clash in the Commons will highlight an interesting question: can Parliament influence ministers in the Brexit negotiations?