Donald Trump's state visit to the UK will go ahead despite widespread outrage over the travel ban he imposed on Muslims and refugees.

With an online petition calling for the honour to be withdrawn from Mr Trump being backed by one million people, Theresa May came under pressure to downgrade or axe the visit.

But Downing Street said its position had not changed as a spokesman stated: "An invitation has been extended and accepted."

Read more: Protests against Donald Trump's 'Muslim ban' to be held across Scotland

Ministers face being hauled into the Commons later amid continued concerns about the impact on Britons, as well as the way the Government has responded.

The Foreign Office said Britons with dual citizenship would be exempt from the controversial travel ban, but UK residents have been caught up in the chaos.

The US president accepted an invitation to visit Britain later this year, where he is due to be hosted by the Queen and would be treated to all the pomp and ceremony accorded to a state visit.

Baroness Warsi, who was the first female Muslim cabinet minister, said Mr Trump should not be given the honour of a state visit.

"We have to question whether, in Britain, this is something that Britain should be doing for a man who has no respect for women, disdain for minorities, little value for LGBT communities, no compassion for the vulnerable and whose policies are rooted in divisive rhetoric," the Tory peer said.

She added: "Those who run and govern this country bowing down to a man who holds the views that he holds, values which are not the same as British values, I think is sending out a very wrong signal."

Lady Warsi told the BBC Radio 4 Today programme politics is facing a "crossroads" following Mr Trump's election.

Read more: Protests against Donald Trump's 'Muslim ban' to be held across Scotland

"If we want to continue to be a country that supports liberal, progressive values in which all have equal worth and equal value in our society, then we have to be clear that we voice that view and that opinion, so that people in this country know that whatever crazy things the President of the United States may be doing, it is not what we believe and not what we support."

Conservative former foreign office minister Alistair Burt said the "optics of a visit are currently very bad" and suggested American officials should find a way for it not to go ahead.

Labour MP Dan Jarvis said it was "very likely" there would be an urgent question in the House of Commons on Monday to discuss the travel ban.

The anti-visit petition states: "Donald Trump should be allowed to enter the UK in his capacity as head of the US Government, but he should not be invited to make an official state visit because it would cause embarrassment to Her Majesty the Queen."

Once a petition gains the backing of 100,000 names, Parliament must consider debating the issue.

The Trump petition is the second most supported since the online system was set up, with one calling for a second referendum on EU membership getting the backing of 4,150,260 people.

Demonstrators are planning to protest against the policy outside Downing Street and across the country on Monday evening.

The US president's team told Foreign Secretary Boris Johnson that Britons who have shared nationality with one of the seven mainly-Muslim countries covered by the restrictions would not be stopped from entering America.

Read more: Protests against Donald Trump's 'Muslim ban' to be held across Scotland

But UK dual citizens travelling to the United States directly from one of the banned countries will face extra checks.

Mr Johnson spent Sunday speaking to the president's senior adviser Jared Kushner and chief strategist Stephen Bannon about the implications of immigration curbs.

His officials later issued guidance about what the border clampdown means for the UK.

The statement said:

- The ban applies to only individuals travelling from one of the seven named countries - Iraq, Iran, Libya, Somalia, Sudan, Syria and Yemen.

- Travellers to the US from anywhere other than one of those countries will experience no extra checks, regardless of nationality or place of birth.

- UK nationals travelling from one of those countries are not included in the ban, even if they were born in one of the affected states.

- Dual citizens from one of the seven countries travelling to the US from outside those countries are not affected.

- Dual nationals might have extra checks if they travel directly from one of the seven countries.

Mr Johnson had earlier branded Mr Trump's controversial policy, which includes a bar on all refugees, "divisive and wrong", and criticised the decision to "stigmatise" people based on their nationality.