Member of Parliament

Sir Iain Duncan Smith

Con Conservative Chingford and Woodford Green ID 152

Voting alignment

Sir Iain Duncan Smith has 637 current-MP voting relationships with at least 50 shared comparable votes. These lists show the MPs who most often voted the same way, and the MPs who most often voted differently, when both recorded an Aye or No vote.

Explore Commons-wide voting alignment →

Most similar MPs

Highest same-vote percentages against Sir Iain Duncan Smith.

Exclude own party

Andrew Rosindell 99%

RUK Romford

1,327 same 10 different 1,337 shared

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Rupert Lowe 99%

RB Great Yarmouth

158 same 1 different 159 shared

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Suella Braverman 98%

RUK Fareham and Waterlooville

1,426 same 24 different 1,450 shared

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Danny Kruger 98%

RUK East Wiltshire

1,091 same 23 different 1,114 shared

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Nigel Farage 98%

RUK Clacton

135 same 3 different 138 shared

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Robert Jenrick 97%

RUK Newark

1,431 same 37 different 1,468 shared

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Lee Anderson 97%

RUK Ashfield

1,000 same 34 different 1,034 shared

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James McMurdock 97%

Ind South Basildon and East Thurrock

179 same 6 different 185 shared

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Sarah Pochin 94%

RUK Runcorn and Helsby

175 same 11 different 186 shared

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Alex Easton 94%

Ind North Down

170 same 11 different 181 shared

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Jim Allister 93%

TUV North Antrim

283 same 20 different 303 shared

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Richard Tice 91%

RUK Boston and Skegness

219 same 21 different 240 shared

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Robin Swann 84%

UUP South Antrim

270 same 52 different 322 shared

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Gavin Robinson 82%

DUP Belfast East

1,077 same 238 different 1,315 shared

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Mr Gregory Campbell 82%

DUP East Londonderry

969 same 212 different 1,181 shared

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Dr Al Pinkerton 82%

LD Surrey Heath

237 same 53 different 290 shared

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Sammy Wilson 81%

DUP East Antrim

1,044 same 238 different 1,282 shared

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Gideon Amos 81%

LD Taunton and Wellington

250 same 59 different 309 shared

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Monica Harding 81%

LD Esher and Walton

223 same 54 different 277 shared

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Mr Paul Kohler 81%

LD Wimbledon

199 same 48 different 247 shared

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Jim Shannon 80%

DUP Strangford

1,350 same 341 different 1,691 shared

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Calum Miller 80%

LD Bicester and Woodstock

238 same 61 different 299 shared

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Brian Mathew 80%

LD Melksham and Devizes

227 same 57 different 284 shared

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Mr Angus MacDonald 79%

LD Inverness, Skye and West Ross-shire

197 same 51 different 248 shared

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Helen Maguire 78%

LD Epsom and Ewell

198 same 55 different 253 shared

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Most different MPs

Lowest same-vote percentages against Sir Iain Duncan Smith.

Steve Witherden 1%

Lab Montgomeryshire and Glyndŵr

5 same 338 different 343 shared

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Michael Payne 1%

Lab Gedling

2 same 327 different 329 shared

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Heidi Alexander 2%

Lab Swindon South

13 same 520 different 533 shared

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Alistair Strathern 2%

Lab Hitchin

10 same 431 different 441 shared

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Alex Mayer 2%

Lab Dunstable and Leighton Buzzard

9 same 398 different 407 shared

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Keir Mather 2%

Lab Selby

10 same 397 different 407 shared

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Paul Davies 2%

Lab Colne Valley

8 same 394 different 402 shared

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Callum Anderson 2%

Lab Buckingham and Bletchley

9 same 391 different 400 shared

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Tristan Osborne 2%

Lab Chatham and Aylesford

8 same 389 different 397 shared

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Josh Dean 2%

Lab Hertford and Stortford

9 same 386 different 395 shared

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Steve Yemm 2%

Lab Mansfield

8 same 386 different 394 shared

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Chris Vince 2%

Lab Harlow

8 same 381 different 389 shared

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Matt Turmaine 2%

Lab Watford

9 same 380 different 389 shared

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Adam Thompson 2%

Lab Erewash

8 same 380 different 388 shared

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Andrew Cooper 2%

Lab Mid Cheshire

8 same 380 different 388 shared

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Steve Race 2%

Lab Exeter

8 same 377 different 385 shared

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Danny Beales 2%

Lab Uxbridge and South Ruislip

8 same 375 different 383 shared

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Sam Carling 2%

Lab North West Cambridgeshire

8 same 375 different 383 shared

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Claire Hazelgrove 2%

Lab Filton and Bradley Stoke

9 same 373 different 382 shared

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Harpreet Uppal 2%

Lab Huddersfield

6 same 375 different 381 shared

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Andrew Lewin 2%

Lab Welwyn Hatfield

8 same 372 different 380 shared

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John Whitby 2%

Lab Derbyshire Dales

7 same 373 different 380 shared

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Gen Kitchen 2%

Lab Wellingborough and Rushden

7 same 372 different 379 shared

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Jim Dickson 2%

Lab Dartford

7 same 372 different 379 shared

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John Slinger 2%

Lab Rugby

8 same 371 different 379 shared

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Voting source Commons Votes API

Method Only divisions where both MPs recorded comparable Aye/No votes are included. Tellers, absences, abstentions, and missing votes are excluded.