LONDON, June 26 (Xinhua) -- The first major piece of legislation to pave the way for Britain's exit from the European Union (EU) became law Tuesday after it was given the Royal Assent by Queen Elizabeth.

The Queen's signature in the European Union Withdrawal Bill means it is now official British legislation.

The bill gives Prime Minister Theresa May's government the power to transfer thousands of pieces of EU legislation into British law after Brexit.

The so-called Brexit bill endured a roller-coaster ride as it went through the legislative and parliamentary processes in both the House of Commons and the House of Lords.

Members in the unelected upper chamber voted in favor of a number of amendments, threatening the success of May's Brexit bill, described as the most important new law since the end of World War II.

The Speaker of the House of Commons John Bercow announced to MPs at the start of Tuesday's session, that the Brexit bill had been signed by the Queen. His announcement was greeted with a loud cheer from Members of Parliament, while a similar announcement was made in the House of Lords.

The Brexit journey is far from over with more pieces of legislation related to Britain's withdrawal waiting to enter the parliamentary process.?