Compare

Keir Mather vs Melanie Onn

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

Photograph of Keir Mather
Keir Mather
Lab Selby
vs
Photograph of Melanie Onn
Melanie Onn
Lab Great Grimsby and Cleethorpes

Voting alignment

Keir Mather and Melanie Onn voted the same way 100% of the time, based on 327 shared comparable votes.

327 same votes 0 different votes 327 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
39 Aye 31 No
Tax 100% aligned 70 shared votes
39 Aye 31 No
24 Aye 10 No
Education 100% aligned 34 shared votes
24 Aye 10 No
18 Aye 8 No
Crime / Justice 100% aligned 26 shared votes
18 Aye 8 No
8 Aye 12 No
Defence 100% aligned 20 shared votes
8 Aye 12 No
10 Aye 7 No
Benefits 100% aligned 17 shared votes
10 Aye 7 No
Most different by topic
39 Aye 31 No
Tax 100% aligned 70 shared votes
39 Aye 31 No
24 Aye 10 No
Education 100% aligned 34 shared votes
24 Aye 10 No
18 Aye 8 No
Crime / Justice 100% aligned 26 shared votes
18 Aye 8 No
8 Aye 12 No
Defence 100% aligned 20 shared votes
8 Aye 12 No
10 Aye 7 No
Benefits 100% aligned 17 shared votes
10 Aye 7 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
73.9%
1% above average
Rank 335 of 649
602
796 eligible divisions
Total votes
436
590 eligible divisions
294
48.8% of votes cast
Aye votes
214
49.1% of votes cast
308
51.2% of votes cast
No votes
222
50.9% 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
+19.4 vs Commons average
Rank 160 of 650
Appearances
91
+7.4 vs Commons average
Rank 215 of 650
546
+400.3 vs Commons average
Rank 16 of 650
Contributions
114
-31.7 vs Commons average
Rank 297 of 650

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

Financials and interests

£451,152
all imported IPSA years
Lifetime expenses
£1,014,663
all imported IPSA years
£306,391
35% above average
Latest expenses
£201,216
11% below average
1
1 registered category
Registered interests
6
1 registered category
0
matched sponsored bills
Sponsored bills
3
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
Foreign Affairs
4 of 4 votes
Democracy / Parliament
16 of 17 votes
#2
Devolution / Local Government
21 of 24 votes
Transport
31 of 33 votes
#3
Trade
6 of 7 votes
Benefits
27 of 31 votes
#4
Energy
17 of 20 votes
NHS / Health
12 of 14 votes
#5
Tax
94 of 112 votes

Recent voting overlap

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

Where they voted the same
Aye
Terminally Ill Adults (End of Life) Bill: Second Reading 11 Sept 2026
Aye
Aye
Closure motion 11 Sept 2026
Aye
Aye
Draft Plant Health, Seeds, Seed Potatoes and Plant Propagating Material (Amendment) (Northern Ireland) Regulations 2026 9 Sept 2026
Aye
No
Health Bill: Report Stage: Amendment 1 8 Sept 2026
No
No
Health Bill: Report Stage: New Clause 143 8 Sept 2026
No
No
Health Bill: Report Stage: New Clause 142 8 Sept 2026
No
No
Health Bill: Report Stage: New Clause 145 7 Sept 2026
No
No
Health Bill: Report Stage: New Clause 6 7 Sept 2026
No
Aye
Representation of the People Bill: Third Reading 2 Sept 2026
Democracy / Parliament
Aye
No
Representation of the People Bill: Report Stage: New Clause 88 2 Sept 2026
Democracy / Parliament
No
Member source UK Parliament Members API
Voting source Commons Votes API