The 17.4 million who voted for Britain to leave the European Union were giving advice, rather than an instruction, to Parliament. This ought not to be a controversial point. David Cameron chose to hold a consultative rather than a legally binding referendum – and was able to do this because it would be unthinkable for parliament to ignore such advice, or stand athwart the result of that referendum. All parties regarded the referendum as politically binding. All knew that, if Brexit was voted down, then parliament would be quickly dissolved and a general election called.
The British constitution is unwritten, reflecting a British distaste for schematic articles of political faith. For centuries, we have got along rather well by following some basic rules – and an understanding that laws are decided not by 10 Downing Street or by judges but by the Queen, through Parliament.
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