Asked if he was now in a position where he had to rule out an extension to Brexit, the PM said: "On the contrary, as the law currently stands, the UK leaves the EU on October 31 come what may, but the interesting thing - the exciting thing - for us now is to get a deal, and that's what we're working on.

"I'll be honest with you, it's not made much easier by this kind of stuff in Parliament or in the courts."

When it was suggested to the PM that, as the law stands, the UK cannot leave without a deal on 31 October without a deal, Mr Johnson added: "As the law stands we leave on October 31 and I'm very hopeful that we will get a deal.

"I think what the people of the country want is to see parliamentarians coming together, working in the national interest to get this thing done."

BBC Radio 5 Live

BBC Radio 5 Live is asking listeners what they think:

"So the EU and Parliament are getting their own ways - frustrate everything until they get remain. I was Remain now I am exit with or without a deal. Will they waste another three years avoiding a decision?" Mark, Shrewley

"This decision is a total stitch up by the establishment. Boris is only trying to do what voters instructed parliament to do." Doreen, Norwich

"As a supporter of the prime minister, I agree with Jeremy Corbyn, let's have a general election and let the people decide. Of course, unlike Corbyn, I actually mean it." Stu, Derbyshire

"This is nothing to do with Leave or Remain and everything to do with democracy. We can not undermine the rule of law in the way this government is doing." Kath

"What a wonderful ruling, and unanimously! Rather than complain, arch-Brexiteers should celebrate a victory for democracy and the rule of law. This is the 21st century, not feudal Britain!" Steve, West Yorkshire

"I'm a high tax payer, but just a normal, decent hard working man who voted Brexit to get back to what we voted on in the 1970's..... free trade and nothing else. I hate to say, I hate this country we live in. It's us and them. The establishment has no regard for the working man. I need to get out of this terrible country and put my money into a country that's appreciates me and listens to our vote." Stephen, Norwich

"Leave voters will be tearing their hair out today. We may have lost a battle - we will win the war. We will win our war at the ballot box not the courts." Brian, Manchester

"I'm a Brexiteer of 30 years but I agree with this decision. The prime minister isn't God Almighty. He can't just close down Parliament because he doesn't like it holding him to account. This is a fundamental constitutional issue, not about Brexit." Simon, Leicester

Have your say: Text 85058 / @BBC5Live, external

Click to listen live on BBC Sounds.

The Supreme Court ruling that prorogation is unlawful is a victory for the rule of law, says the Welsh First Minister Mark Drakeford.

Commenting on the Supreme Court ruling, PM Boris Johnson said:"Obviously this is a verdict we will respect, we will respect the judicial process.

"I don't think that it's right, but we will go ahead and of course Parliament will come back.

He added: "The important thing is we get on and deliver Brexit on October 31.

"They thought the prorogation that we chose was not something they could approve of.

"The main thing is that we will get on and deliver Brexit on October 31... but Parliament will come back and we will respect that.

Asked if he would apologise, Mr Johnson said he did not think the ruling was "the right decision".

Boris Johnson's original schedule in New York had him returning to the UK tomorrow - but could that change?

Image source, EPA

The UK Supreme Court ruled unanimously that Boris Johnson's suspension of Parliament was unlawful.

We've chosen a sample of the questions we received from readers on this subject.

Does this mean Parliament will be reconvened? - Ollie Andrews-Heywood

Yes, it does. The Supreme Court ruled that the prorogation was void - that is, it didn't actually take place. Parliament doesn't have to be formally "recalled".

Speaker John Bercow says he has issued instructions to ensure the House of Commons is ready to resume business as quickly as possible.

He says it will now sit on Wednesday.

Read more here.

Former prime minister Sir John Major has said he hoped today's ruling will "deter any future prime minister from attempting to shut down Parliament".

Sir John, a long-term critic of the government's decision to prorogue Parliament, added that: "no prime minister must ever treat the monarch or Parliament in this way again".

Image source, Reuters

The Queen, and the advice given to her, was mentioned several times in the court's ruling but Buckingham Palace has not yet commented on it.

The Queen is still at Balmoral in the Scottish Highlands, where she is spending her annual summer break.

James Landale
Diplomatic correspondent

We’re in the city of Boris Johnson's birth - New York - and he now finds himself closeted with his team desperately working out what reaction they are going to give to today's ruling.

He has practical decisions to make as well as substantive ones: above all, does he go home?

He’s got a full schedule of work to do at the United Nations: by my count he’s got at least seven meetings with other heads of government - not just with President Trump but also the president of Iran and various other European leaders.

He’s also scheduled to give his first ever address to the UN general assembly as prime minister. These are not small matters.

And there is also the optics of this: if he rushes home does he add to the sense of panic? Or does he say no, the business of government carries on?

Last night the government were briefing not to expect an immediate response, they would take time to digest it, simply because they didn’t know what the ruling was going to be.

And I doubt they anticipated entirely that this would be the outcome.

Jonny Dymond
BBC royal correspondent

Image source, PA Media

This is a hideous moment for the Palace.

The Queen had very little discretion over whether to prorogue Parliament; she acts in this case on the advice of her prime minister.

Whilst some argue that Boris Johnson lacked the legitimacy of other prime ministers, and that this might have swayed the Queen’s decision, that would have meant stepping into (even more of) a constitutional minefield.

But to have an Order in Council – the exercise of Royal Prerogative, the mechanism by which the prorogation takes place – ruled unlawful and void, is breathtaking.

Worse for the Palace, and for the Queen, is the spotlight this throws onto all the dark corners of the British constitution.

For decades, for centuries, it’s been governed by convention and precedent, and an unspoken agreement not to push things too far. Boris Johnson blew that apart.

And now the demands for a written constitution are coming. And with them the inevitable question – just what role should there be for a hereditary monarch?

The pound rose against the dollar and the euro as traders digested the verdict from the Supreme Court that the prime minister's decision to prorogue Parliament was unlawful.

In the immediate moments following the judgement, the pound rose about 0.5% against the euro - going from lows of one pound being worth 1.12970 euros at 9am, to 1.13532 euros at 10.40am.

Both jumps have cooled as the markets wait to see what happens next, but analysts and commentators saw the ruling as positive for avoiding future unpredictable decision-making by Downing Street.

The Green Party's sole MP Caroline Lucas says it does not matter "what you think about Brexit...Parliament must immediately resume, Johnson must go".

Image source, Getty Images

The UK Supreme Court has ruled that the decision to suspend Parliament, only days after MPs returned to Westminster, was unlawful.

But why was Parliament shut down in the first place?

The official term for shutting down Parliament is "proroguing". MPs do not vote to prorogue - it's a power that rests with the Queen, done on the advice of the prime minister.

So, it is within Boris Johnson's gift to ask the Queen to shut Parliament.

However, even though the Queen agreed to the request, legal proceedings were brought against the government.

Continue reading here.

BBC News Channel

Liberal Democrat Leader Jo Swinson says the verdict proves Mr Johnson is "not fit for office" and "should resign".

"He has acted unlawfully in trying to silence Parliament, trying to silence the voices of the people, because he does not want to be held to account, he does not want to answer questions about his disastrous Brexit policy," she says.