MPs begin questioning experts about the assisted dying bill over three days this week. In the Commons there are debates on proportional representation, creative industries, and Post Office closures. MPs will consider water company regulations and motions about the requirements for an Office of Budget Responsibility assessment and a breach of the annual cap on welfare spending. Peers continue scrutinising the Data (Use and Access) Bill and Mental Health Bill. Energy Secretary Ed Miliband will be questioned about progress on Net Zero by the Environmental Audit Committee.