When the triggering of Article 50 comes before the Commons many MPs will have a difficult decision – vote with their constituents or vote with the party whip.
So far it appears only one Conservative – the indefatigable Europhile Ken Clarke – and a handful of Labour MPs are willing to ignore the party line.
Here is a list of those we believe will vote against Article 50:
Conservative
Ken Clarke – Rushcliffe
Labour
Neil Coyle – Bermondsey and Old Southwark
Geraint Davies – Swansea West
Thangam Debbonaire – Bristol West
Helen Hayes – Dulwich and West Norwood
Peter Kyle – Hove
David Lammy – Tottenham
Tulip Siddiq – Hampstead and Kilburn
Owen Smith – Pontypridd
Catherine West – Hornsey and Wood Green
Daniel Zeichner – Cambridge
Liberal Democrat
Tom Brake – Carshalton and Wallington
Alistair Carmichael – Orkney and Shetland
Nick Clegg – Sheffield Hallam
Tim Farron – Westmorland and Lonsdale
Sarah Olney – Richmond Park and North Kingston
Mark Williams – Ceredigion
Green
Caroline Lucas – Brighton Pavilion
Scottish National Party
Tasmina Ahmed-Sheikh – Ochil and South Perthshire
Richard Arkless – Dumfries and Galloway
Hannah Bardell – Livingston
Mhari Black – Paisley and Renfrewshire South
Ian Blackford – Ross, Skye and Lochaber
Kirsty Blackman – Aberdeen North
Philip Boswell – Coatbridge, Chryston and Bellshill
Deidre Brock – Edinburgh North and Leith
Alan Brown – Kilmarnock and Loudoun
Lisa Cameron – East Kilbride, Strathaven and Lesmahagow
Douglas Chapman – Dunfermline and West Fife
Joanna Cherry – Edinburgh South West
Ronnie Cowan – Inverclyde
Angela Crawley – Lanark and Hamilton East
Martyn Day – Linlithgow and East Falkirk
Martin Docherty – West Dunbartonshire
Stuart Donaldson – West Aberdeenshire and Kincardine
Marion Fellows – Motherwell and Wishaw
Margaret Ferrier – Rutherglen and Hamilton West
Stephen Gethins – North East Fife
Patricia Gibson – North Ayrshire and Arran
Patrick Grady – Glasgow North
Peter Grant – Glenrothes
Neil Gray – Airdrie and Shotts
Drew Hendry – Inverness, Nairn, Badenoch and Strathspey
Stewart Hosie – Dundee East
George Kerevan – East Lothian
Calum Kerr – Berwickshire, Roxburgh and Selkirk
Chris Law – Dundee West
Angus MacNeil – Na h-Eileanan an Iar
Callum McCraig – Aberdeen South
Stewart McDonald – Glasgow South
Stuart McDonald – Cumbernauld, Kilsyth and Kirkintilloch East
Anne McLaughlin – Glasgow North East
John McNally – Falkirk
Carol Monaghan – Glasgow North West
Paul Monaghan – Caithness, Sutherland and Easter Ross
Roger Mullin – Kirkcaldy and Cowdenbeath
Gavin Newlands – Paisley and Renfrewshire North
John Nicolson – East Dunbartonshire
Brendan O’Hara – Argyll and Bute
Kirsten Oswald – East Renfrewshire
Steven Paterson – Stirling
Alex Salmond – Gordon
Tommy Sheppard – Edinburgh East
Christopher Stephens – Glasgow South West
Alison Thewliss – Glasgow Central
Owen Thompson – Midlothian
Michael Weir – Angus
Elidh Whiteford – Banff and Buchan
Philippa Whitford – Central Ayrshire
Corri Wilson – Ayr, Carrick and Cumnock
Pete Wishart – Perth and North Perthshire
Social Democratic and Labour Party (Northern Ireland)
Mark Durkan – Foyle
Alasdair McDonnell – South Belfast
Margaret Ritchie – South Down