Partygate: Who are the Tory MPs calling on Boris Johnson to go?

There are now 28 Conservative MPs who have publicly called on Boris Johnson to step down over revelations of widespread Covid-rule breaking in Downing Street.

If 54 MPs submit letters of no confidence in the prime minister a vote on his leadership would then be held. However, not all of these MPs have publicly said they have submitted a letter.

Equally, there are likely to be other MPs who who have sent letters to Sir Graham Brady, who organises Tory leadership contests, but who have not made them public.

Here is the full list that have broken cover to urg him to step down.

Constituency: East Worthing and Shoreham

Mr Loughton served as a junior minister for children under David Cameron. He supported leaving the EU in the 2016 referendum and backed Boris Johnson over Jeremy Hunt in the 2019 leadership election. Not known if he has submitted a no-confidence letter.

Constituency: Haltemprice and Howden

A prominent supporter of Brexit, David Davis served as Secretary of State for Exiting the EU under Theresa May but resigned after deciding he couldn't support her plans for a deal. He also came second to David Cameron in the 2005 Conservative leadership election. Not known if he has submitted a no-confidence letter.

Constituency: Sutton Coldfield

First elected: 1987 (he lost his seat in 1997 but was returned to parliament in 2001)

A former cabinet minister under David Cameron. Andrew Mitchell supported remaining in the EU in 2016 and has been a key critic of Boris Johnson's cuts to international development funding. Not known if he has submitted a no-confidence letter.

Constituency: North Thanet

A consistent critic of Boris Johnson, Roger Gale voted against the government's plans to break international law during the EU Trade deal negotiations in 2020. Has submitted a no-confidence letter.

Peter Aldous has criticised the government over its handling of universal credit and argued they should have kept the £20 top-up to the payment that was introduced during the pandemic. Has submitted a no-confidence letter.

Before becoming a MP, Anthony Mangnall was an adviser to former Foreign Secretary William Hague. In Parliament, he has rebelled against the government on votes on Covid restrictions and international aid cuts. Has submitted a no-confidence letter.

Constituency: South West Devon

A supporter of Remain in the 2016 EU referendum. He did not support Boris Johnson in the 2019 leadership contest. Has submitted a no-confidence letter.

Constituency: Bournemouth East

A junior minister under David Cameron and Theresa May, Tobias Ellwood is a former soldier and now serves as chairman of the defence select committee. He supported remaining in the EU in 2016. Has submitted a no-confidence letter.

Constituency: Newcastle-under-Lyme

Mr Bell rebelled against the government when it ordered MPs to vote to change standards rules when Owen Paterson was found to have broken them. Has submitted a no-confidence letter.

Constituency: Bognor Regis and Littlehampton

Previously served as schools minister under David Cameron, Theresa May and Boris Johnson. He supported staying in the EU in 2016 and backed Michael Gove for the party leadership in 2019. Has submitted a no-confidence letter.

Constituency: Calder Valley

Mr Whittaker supported Remain in 2016 and has rebelled against Boris Johnson's government twice over Covid restrictions. Not known if he has submitted a no-confidence letter.

Constituency: Penrith and The Border

Dr Hudson has rebelled against the government several times, including by voting against their plans to cut foreign aid and raise National Insurance. Not known if he has submitted a no-confidence letter.

Constituency: Romsey and Southampton North

Ms Nokes attended cabinet as immigration minister under Theresa May. She left government under Boris Johnson and was one of the 21 Conservative MPs who had the whip removed in 2019 for voting against the government's Brexit position. She currently serves as chair of the Women and Equalities Select Committee. Has submitted a no-confidence letter.

Constituency: Forest of Dean

Chief Whip under David Cameron. During the Covid-19 pandemic Mr Harper has repeatedly criticised the government's policies, speaking out against lockdowns and calling for looser legal restrictions. Has submitted a no-confidence letter.

Constituency: Hazel Grove

A consistent rebel against the government, Mr Wragg has voted against their proposals 20 times during the current parliament. He also chairs the Commons Public Administration and Constitutional Affairs Select Committee. Has submitted a no-confidence letter.

A prominent backbench supporter of leaving the EU. Mr Baker previously submitted a letter of no confidence in Theresa May and backed Boris Johnson when she stood down as prime minister. Not known if he has submitted a no-confidence letter in Mr Johnson.

Mr Study is a backbench MP who has voted against the government several times, including by rebelling against Covid restrictions. Not known if he has submitted a no-confidence letter.

Constituency: Basildon and Billericay

A supporter of leaving the EU in 2016, Mr Baron is also notable for repeatedly criticising UK military intervention abroad. Not known if he has submitted a no-confidence letter.

Stephen Hammond was a supporter of remaining in the EU in 2016 and was one of the 21 Conservative MPs who had the whip removed in 2019 for voting against the government's Brexit position. Has submitted a no-confidence letter.

Constituency: Ruislip, Northwood and Pinner

Mr Simmonds previously called on Dominic Cummings to resign when he was accused of breaching lockdown rules in May 2020. Not known if he has submitted a no-confidence letter.

Constituency: Rutland and Melton

Ms Kearns sits on the executive of the influential backbench 1922 committee and was the leading figure in the "Pork Pie plot" to oust the PM. She has also been critical of the government's position on the rights of transgender people. Has submitted a no-confidence letter.

Constituency: Bromley and Chislehurst

Sir Bob supported remaining in the EU in 2016 and currently chairs the Commons Justice Select Committee. Has submitted a no-confidence letter.

Mr Brine was one of the 21 Conservative MPs who had the whip removed in 2019 for voting against the government's Brexit position and has rebelled against the government on votes on Covid restrictions several times. Has submitted a no-confidence letter.

Constituency: Newton Abbot

Ms Morris previously had the Conservative whip withdrawn for voting in favour of a Labour motion to extend the provision of free school meals during school holidays until Easter 2021. Has submitted a no-confidence letter.

Constituency: Kenilworth and Southam

Now a backbencher, Jeremy Wright previously served as Attorney General and then Culture Secretary under David Cameron and Theresa May. Not known if he has submitted a no-confidence letter.

Constituency: Carshalton and Wallington

Mr Colburn has disagreed with the government on transgender rights and criticised the decision to exclude trans people from its proposed conversion therapy ban. Has submitted a no-confidence letter.

Constituency: North West Leicestershire

Mr Bridgen supported leaving the EU in 2016 and Boris Johnson in the 2019 leadership election. He has previously submitted letters of no confidence in both David Cameron and Theresa May. Has submitted a no-confidence letter.

Mr Stevenson supported remaining in the EU in 2016. He has criticised the government over universal credit and called on them to maintain the £20 top-up implemented during the pandemic. Has submitted a no-confidence letter.