>> All you need is love, and apparently, a legal bid to block Article 50 from being triggered. A London law firm announcing on Monday that's it's mounting a legal challenge demanding the British government win legislative approval from Parliament before triggering Brexit negotiations. But the tens of thousands of protesters who marched through the streets on London Saturday shouldn't get excited.
Reuter's UK Correspondent Sarah Young says, this won't put the outcome of the Referendum in doubt.>> The law firm says in it's statement, we're not trying to interfere with the will of the British people. I think what the law firm are trying to do is make sure that, should Article 50 be triggered, and the process be formerly started, that the case for that is watertight, that later on down the line they can't say, you didn't follow this legal procedure.
>> Negotiations on how Britain would leave the block are already on hold until the country gets a new Prime Minister. One of the big contenders, Theresa May, saying on Sunday she wants to wait until next year. If law firm Mishcon de Reya is successful in it's legal challenge, it could further complicate Brexit planning.
>> If it needs to go to Parliament to have a vote, it's obviously going to take a bit longer. And we're not sure how MP's would vote in that situation. The people, the British people have voted. But actually within the House of Commons, an overwhelming majority of MP's voted to remain in the EU.
>> The UK will have two years to leave the bloc once article 50 is triggered. These protestors are keen for that never to happen. But the message from all sides so far is Brexit means Brexit.