Compare

Melanie Onn vs Deirdre Costigan

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

Photograph of Melanie Onn
Melanie Onn
Lab Great Grimsby and Cleethorpes
vs
Photograph of Deirdre Costigan
Deirdre Costigan
Lab Ealing Southall

Voting alignment

Melanie Onn and Deirdre Costigan voted the same way 100% of the time, based on 355 shared comparable votes.

355 same votes 0 different votes 355 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
44 Aye 37 No
Tax 100% aligned 81 shared votes
44 Aye 37 No
22 Aye 13 No
Education 100% aligned 35 shared votes
22 Aye 13 No
20 Aye 10 No
Crime / Justice 100% aligned 30 shared votes
20 Aye 10 No
8 Aye 12 No
Defence 100% aligned 20 shared votes
8 Aye 12 No
9 Aye 8 No
Energy 100% aligned 17 shared votes
9 Aye 8 No
Most different by topic
44 Aye 37 No
Tax 100% aligned 81 shared votes
44 Aye 37 No
22 Aye 13 No
Education 100% aligned 35 shared votes
22 Aye 13 No
20 Aye 10 No
Crime / Justice 100% aligned 30 shared votes
20 Aye 10 No
8 Aye 12 No
Defence 100% aligned 20 shared votes
8 Aye 12 No
9 Aye 8 No
Energy 100% aligned 17 shared votes
9 Aye 8 No

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

Voting record

73.5 %
1 % above average
Rank 346 of 649
Participation
91.1 %
18 % above average
Rank 14 of 649
421
573 eligible divisions
Total votes
522
573 eligible divisions
208
49.4 % of votes cast
Aye votes
271
51.9 % of votes cast
213
50.6 % of votes cast
No votes
251
48.1 % of votes cast
1
0.2 % of votes cast
Against party
1
0.2 % of votes cast
2 years, 0 months
Since 4 Jul 2024
Commons service
2 years, 0 months
Since 4 Jul 2024

Debates

80
+3.0 vs Commons average
Rank 225 of 649
Appearances
9
-68.0 vs Commons average
Rank 615 of 649
102
-34.7 vs Commons average
Rank 308 of 649
Contributions
12
-124.7 vs Commons average
Rank 614 of 649

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

Financials and interests

£1,014,663
all imported IPSA years
Lifetime expenses
£196,485
all imported IPSA years
£201,216
11 % below average
Latest expenses
£196,485
13 % below average
6
1 registered category
Registered interests
0
0 registered categories
3
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

Foreign Affairs
4 of 4 votes
#1
Work / Employment
37 of 37 votes
Devolution / Local Government
21 of 24 votes
#2
Housing
31 of 31 votes
Energy
17 of 20 votes
#3
Migration
13 of 13 votes
Tax
94 of 111 votes
#4
Digital / Online Safety
11 of 11 votes
NHS / Health
9 of 11 votes
#5
NHS / Health
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
No
Public Office (Accountability) Bill Report Stage: Amendment 19 14 Jul 2026
No
No
Public Office (Accountability) Bill Report Stage: Amendment 199 14 Jul 2026
No
No
Public Office (Accountability) Bill Report Stage: Amendment 3 14 Jul 2026
No
Aye
Immigration and Asylum Bill: Second Reading 13 Jul 2026
Migration
Aye
No
Immigration and Asylum Bill: Reasoned Amendment to Second Reading 13 Jul 2026
Migration
No
Aye
Draft Children’s Wellbeing and Schools Act 2026 (Establishment of Schools) (Consequential Amendments) Regulations 2026 8 Jul 2026
Education
Aye
Aye
Draft Supply of Machinery (Safety) (Amendment etc.) and the EU Machinery Regulation (Enforcement etc. in Northern Ireland) Regulations 2026 8 Jul 2026
Aye
Aye
Draft Town and Country Planning (Discharge of Local Planning Authority Functions) (England) Regulations 2026 8 Jul 2026
Aye
Aye
National Security (State Threats) Bill: motion to agree to Lords Amendment 1 6 Jul 2026
Defence
Aye
No
Taxation (Energy and Vehicles) Bill Committee: New Clause 5 1 Jul 2026
Energy Tax Transport
No
Member source UK Parliament Members API
Voting source Commons Votes API