Britain's opposition Labour Party leader, Jeremy Corbyn, speaks during PMQ session in Parliament, in London, Britain, January 30, 2019. UK Parliament/Mark Duffy/Handout via REUTERS

LONDON (Reuters) - Britain’s opposition Labour Party leader Jeremy Corbyn has written to Prime Minister Theresa May, offering to support her Brexit deal if she makes five legally binding commitments – including joining a customs union.

Below are Labour’s five demands for supporting her deal:

- A permanent customs union. This would include a say in future trade deals

- Close alignment with the EU’s single market. This would be underpinned by shared institutions and obligations

- A pledge to keep workers’ rights in line with those in the EU

- Commitments on participation in EU agencies and funding programs, including in areas such as the environment, education, and industrial regulation

- Agreements on the detail of future security arrangements, including access to the European Arrest Warrant