The Commons is debating changes to police employee pension contributions. Peers are questioning government ministers in the Lords.
Scottish Labour leads a debate on ending the current ScotRail contract early.
The European Parliament approves new caps on the price of intra-EU phone calls and text messages.
Committee members scrutinise the Welsh Government draft budget. Debates include replacing EU Funding for Wales, and animal welfare.
The RHI Inquiry's public hearings draw to a close with more revelations about the botched scheme.
The Lords will debate the proposed suspension Lord Lester of Herne Hill on Thursday, but an unprecedented amendment means peers will be arguing about whether the process was fair.