On June 26, the European Union (Withdrawal) Act 2018 (Withdrawal Act) received royal assent, which is the final stage for approving UK parliamentary bills.
The Corporate & Financial Weekly Digest edition of July 14, 2017 included a substantive review of the Withdrawal Act. Notably, the House of Commons amended that bill to require that any EU withdrawal agreement must be debated and voted on by the House of Commons before the European Parliament consents to the withdrawal agreement being concluded on behalf of the European Union.
The Withdrawal Act is available here.