The following tables compare the results of opinion polls of voting intentions for the elections that were held on May 5th in London, Scotland and Wales with the final outcome. A poll is included if its fieldwork was conducted wholly or mostly in the seven days before polling day (May 5th), and it was the final poll published by the pollster concerned. (This is a slightly longer period than is normally used in BPC reports on the performance of the polls in general elections — the period has been lengthened because there were very few polls conducted in the last few days.)
It should be noted that all of these polls were conducted online, with the exception of the Survation poll in Scotland, which was conducted by telephone.
London Mayor 1st Preference Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | UKIP | Green | Other |
|---|---|---|---|---|---|---|
| Opinium 26.4–1.5.16 | 35 | 48 | 4 | 5 | 5 | 3 |
| TNS 26.4–3.5.16 | 33 | 45 | 7 | 5 | 4 | 5 |
| ComRes 28.4–3.5.16 | 36 | 45 | 6 | 4 | 6 | 3 |
| YouGov 2–4.5.16 | 32 | 43 | 6 | 7 | 7 | 5 |
| RESULT | 35 | 44 | 5 | 4 | 6 | 7 |
London Mayor After Redistribution of 2nd Preferences
| Company / Fieldwork Dates | Con | Lab |
|---|---|---|
| Opinium 26.4–1.5.16 | 43 | 57 |
| TNS 26.4–3.5.16 | 43 | 57 |
| ComRes 28.4–3.5.16 | 44 | 56 |
| YouGov 2–4.5.16 | 43 | 57 |
| RESULT | 43 | 57 |
London Assembly — Constituency Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | UKIP | Green | Other |
|---|---|---|---|---|---|---|
| YouGov 2–4.5.16 | 30 | 44 | 7 | 11 | 7 | 1 |
| RESULT | 31 | 42 | 8 | 8 | 9 | 3 |
London Assembly — List Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | UKIP | Green | Other |
|---|---|---|---|---|---|---|
| YouGov 2–4.5.16 | 29 | 39 | 8 | 11 | 9 | 5 |
| RESULT | 29 | 40 | 6 | 8 | 8 | 3 |
Scotland — Constituency Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | SNP | Green | Other |
|---|---|---|---|---|---|---|
| Survation 1–2.5.16 | 19 | 21 | 7 | 49 | 5 | |
| YouGov 2–4.5.16 | 19 | 22 | 7 | 48 | – | 4 |
| RESULT | 22 | 23 | 8 | 47 | – | 1 |
Scotland — List Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | SNP | Green | Other |
|---|---|---|---|---|---|---|
| Survation 1–2.5.16 | 20 | 19 | 8 | 43 | 7 | 4 |
| YouGov 2–4.5.16 | 20 | 19 | 6 | 41 | 9 | 5 |
| RESULT | 23 | 19 | 5 | 42 | 7 | 4 |
Wales — Constituency Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | PC | UKIP | Other |
|---|---|---|---|---|---|---|
| YouGov 2–4.5.16 | 21 | 33 | 8 | 19 | 16 | 4 |
| RESULT | 21 | 35 | 8 | 21 | 12 | 3 |
Wales — List Vote
| Company / Fieldwork Dates | Con | Lab | LibDem | PC | UKIP | Other |
|---|---|---|---|---|---|---|
| YouGov 5.5.16 | 20 | 31 | 6 | 20 | 16 | 8 |
| RESULT | 19 | 31 | 6 | 21 | 13 | 3 |
YouGov also conducted on polling day an exercise in which it recontacted a sample of those who it had interviewed previously in order to ascertain how they had or intended to vote. This produced the same result for the Constituency vote, and very similar figures for the list vote: Con 19%, Lab 30% LibDem 6%, PC 21%, UKIP 16% and other 8%.