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Keir Mather vs Deirdre Costigan

A side-by-side comparison of voting participation, party rebellion, topic focus, and recent voting overlap.


Voting alignment

Keir Mather and Deirdre Costigan voted the same way 100% of the time, based on 349 shared comparable votes.

349 same votes 0 different votes 349 shared votes

Alignment only includes divisions where both MPs recorded an Aye or No vote. Tellers, absences, abstentions, and missing votes are excluded.

Topic alignment

Closest by topic
34 Aye 33 No
Tax 100% aligned 67 shared votes
34 Aye 33 No
26 Aye 12 No
Education 100% aligned 38 shared votes
26 Aye 12 No
17 Aye 20 No
Crime / Justice 100% aligned 37 shared votes
17 Aye 20 No
18 Aye 4 No
Work / Employment 100% aligned 22 shared votes
18 Aye 4 No
7 Aye 13 No
Defence 100% aligned 20 shared votes
7 Aye 13 No
Most different by topic
34 Aye 33 No
Tax 100% aligned 67 shared votes
34 Aye 33 No
26 Aye 12 No
Education 100% aligned 38 shared votes
26 Aye 12 No
17 Aye 20 No
Crime / Justice 100% aligned 37 shared votes
17 Aye 20 No
18 Aye 4 No
Work / Employment 100% aligned 22 shared votes
18 Aye 4 No
7 Aye 13 No
Defence 100% aligned 20 shared votes
7 Aye 13 No

Topic alignment uses local topic tags, so a division can count towards more than one topic.

Voting record

75.6%
3% above average
Rank 296 of 649
Participation
91.2%
19% above average
Rank 13 of 649
602
796 eligible divisions
Total votes
538
590 eligible divisions
294
48.8% of votes cast
Aye votes
277
51.5% of votes cast
308
51.2% of votes cast
No votes
261
48.5% of votes cast
0
0.0% of votes cast
Against party
1
0.2% of votes cast
3 years, 2 months
Since 20 Jul 2023
Commons service
2 years, 3 months
Since 4 Jul 2024

Debates

103
+19.3 vs Commons average
Rank 160 of 649
Appearances
29
-54.7 vs Commons average
Rank 563 of 649
546
+400.1 vs Commons average
Rank 16 of 649
Contributions
33
-112.9 vs Commons average
Rank 568 of 649

Debate figures cover imported Hansard debate appearances from the last 12 months.

Financials and interests

£451,152
all imported IPSA years
Lifetime expenses
£196,485
all imported IPSA years
£306,391
35% above average
Latest expenses
£196,485
13% below average
1
1 registered category
Registered interests
0
0 registered categories
0
matched sponsored bills
Sponsored bills
1
matched sponsored bills

Expenses use IPSA totals for financial year 2024-25. Sponsored bill counts depend on currently imported bill sponsor metadata.

Most active voting topics

Education
50 of 52 votes
#1
Work / Employment
39 of 39 votes
Democracy / Parliament
16 of 17 votes
#2
Housing
32 of 32 votes
Transport
31 of 33 votes
#3
Democracy / Parliament
14 of 14 votes
Benefits
27 of 31 votes
#4
Migration
13 of 13 votes
NHS / Health
12 of 14 votes
#5
Digital / Online Safety
11 of 11 votes

Recent voting overlap

These MPs agreed on every division where both voted in the current comparison sample.

Where they voted the same
Aye
Closure motion 11 Sept 2026
Aye
Member source UK Parliament Members API
Voting source Commons Votes API