ALDC’s by-election report – 11 December 2025

4 parallel white vertical lines on orange background ALDC logoThis week, there were nine local council by-elections, from all over the country. Three local by-elections did not have a Liberal Democrat candidate.

We start in the Highlands, where wewere able to gain this seat, at the expense of the SNP. Congratulations are due to Councillor Matthew Prosser and the local team for winning this seat.

Highland Council, Fort William and Ardnamurchan
First preferences:
Liberal Democrats (Matthew Prosser): 925 (40.5%)
SNP: 665 (29.1%)
Reform UK: 220 (9.6%)
Green Party: 216 (9.4%)
Conservative: 175 (7.6%)
Labour: 87 (3.8%)

Liberal Democrats GAIN from SNP
Elected at Stage 5

Turnout: 25.9%

In the Central Belt, Reform successfully gained this seat, for their first Scottish electoral victory. Thank you to Dougie Butler and the local team for flying the Liberal Democrat flag.

West Lothian Council, Whitburn and Blackburn
First preferences:
Reform UK: 1177 (32.0%)
SNP: 1028 (28.0%)
Labour: 627 (17.1%)
Independent (Lynch): 484 (13.2%)
Conservative: 129 (3.5%)
Liberal Democrats (Douglas Butler): 102 (2.8%)
Green Party: 101 (2.7%)
Independent (Millar): 27 (0.7%)

Reform UK GAIN from Labour
Elected at Stage 8

Turnout: 22.2%


In the Tees Valley, there were two by-elections this week, yet only one had a Liberal Democrat candidate. In Darlington, Reform were able to gain this seat off Labour, with us and the Tories finishing in joint second place. Thank you to Simon Thorley and the local team for flying the Liberal Democrat flag.

Darlington Borough Council, Red Hall and Lingfield
Reform UK: 341 (37.7%, new)
Conservative: 157 (17.3%, -22.5)
Liberal Democrats (Simon Thorley): 157 (17.3%, new)
Labour: 152 (16.8%, -37.1)
Green Party: 89 (9.8%, +3.6)
Independent: 9 (1.0%, new)

Reform UK GAIN from Labour

Turnout: 27.47%


In the West Midlands, the Conservatives successfully defended their seat. Thank you to Morag Maclean and the local team for winning this seat/flying the Liberal Democrat flag.

Lichfield District Council, Armitage with Handsacre
Conservative: 630 (46.7%, -6.3)
Reform UK: 431 (31.9%, new)
Labour: 127 (9.4%, -23.5)
Liberal Democrats (Morag Maclean): 99 (7.3%, -6.8)
Green Party: 63 (4.7%, new)

Conservative HOLD

Turnout: 22.43%


Moving south, we turn to the Welsh Valleys, where a local by-election was prompted by the outcome of the recent Senedd by-election. Plaid Cymru were able to comfortably hold this seat. Thank you to Mary Lloyd and the local team for flying the Liberal Democrat flag.

Caerphilly County Borough Council, Penyrheol
Plaid Cymru: 956 (60.1%, +6.3)
Reform UK: 422 (26.5%, new)
Labour: 114 (7.2%, -24.4)
Conservative: 66 (4.2%, -10.4)
Liberal Democrats (Mary Lloyd): 32 (2.0%, new)

Plaid Cymru HOLD

Turnout: 16.3%


In East Devon, we were able to gain a seat at the expense of the Conservatives, who were attempting to defend this seat, which they won in 2023, but the resigned councillor had since become independent. Congratulations to Councillor Steve Hunt and the local team for this decisive victory.

East Devon District Council, Seaton
Liberal Democrats (Steve Hunt): 789 (41.3%, +21.2)
Reform UK: 565 (29.6%, new)
Conservative: 400 (20.9%, -9.5)
Independent: 156 (8.2%, new)

Liberal Democrats GAIN from Conservative

Turnout: 33.4%


The results for the three by-elections which had no Liberal Democrat candidates are below.

South Kesteven District Council, Aveland
Reform UK: 290 (41.0%, +26.5)
Conservative: 280 (39.5%, +19.0)
Green Party: 115 (16.2%, new)
Labour: 23 (3.2%, new)

Reform UK GAIN from Conservative

Turnout: 35.65%


South Kesteven District Council, Belmont
Reform UK: 239 (33.4%, new)
Conservative: 237 (33.1%, +1.5)
Independent: 143 (20.0%, new)
Green Party: 61 (8.5%, new)
Labour: 35 (4.9%, -14.5)

Reform UK GAIN from Conservative

Turnout: 20.9%


Stockton-on-Tees Borough Council, Eaglescliffe West
Conservative: 1194 (60.9%, +4.4)
Reform UK: 470 (24.0%, +17.6)
Green Party: 150 (7.6%, -0.2)
Labour: 147 (7.5%, -21.7)

Conservative HOLD

Turnout: 35.84%


Thank you to all of our candidates, agents, and campaign teams. A full summary of these results, and all other principal council by-elections, can be found on the ALDC by-elections page here.

* Liam Yip is the Campaigns and Communications Intern at ALDC

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14 Comments

  • David Sparrow 12th Dec '25 - 9:17pm

    A good night overall with two encouraging gains in East Devon and The Highlands but why no candidate in South Kesteven where we were second with a solid 27% base last time?

  • Simple, a collapse of the previous Labour vote in a traditional Labour area.

  • Rif Winfield 13th Dec '25 - 10:36am

    One important aspect of these results (and others in recent weeks) has been the collapse of the Labour vote in many wards, including ones which they held previously or were in a good second place. Some of those votes may go to Greens, but LibDems should be targeting Labour voters everywhere. And look out for the likely annihilation of Labour in the May elections – with massive consequences for the present government and particularly for the Prime Minister. The Conservatives are also going to perform badly, although in some areas they may win seats from Labour even where they lose votes, simply because they will end up losing fewer votes than Labour. Reform will clearly be the big winners again this May, but as before LibDems may gain because they have proved better able to resist Reform than the establishment twosome.

  • Simon Robinson – Thank you for doing the sums. There are lessons here for how we deal with Reform in other places.

  • Kevin Hawkins 13th Dec '25 - 4:34pm

    It is interesting that many voters in West Lothian were not using all of their preferences. Does anyone know what attitude Scottish parties take to using preferences. Do some parties encourage their supporters to “plump” for just one party in the mistaken belief that this helps them?

  • paul barker 13th Dec '25 - 5:59pm

    Looking back at Kevin Hawkins work in averaging Votes, (see last week) we are already equal with Reform, both Parties taking a quarter of the Votes & Reform have been falling since late July. If that trend continues there is a good chance that Reform could come third next May. The battle for top place would be between us & The Tories, the downside of Reforms decline is that most of their Votes go to The Conservatives.

  • Jenny Smith 13th Dec '25 - 6:10pm

    @Kevin Hawkins
    The information released by West Lothian Council about the by-election result reveals that 2157 out of 3675 voters gave a second preference but only 1336 gave a 3rd choice (and only 509 gave a 4th).

    Considering that only 22% of electors bothered to vote, I assume it was the most committed who voted, and they may be less likely to see good things about any party other than their own…

  • Paul; with Reform’s continued but steady decline of which you note – do you think they can hold onto those four seats come the next election ?

  • Greg, Individual Wards are subject to all sorts of local conditions , the 2 South Kesteven Seats No, but Darlington Yes, they are so far ahead. Scottish politics is different, there is an obvious route for tactical Voting but that means crossing the great divide, “Unionists” voting for The SNP. Plus the West Lothian seat has a big Independent vote, locals might know where they would go but I don’t.

  • Peter Martin 14th Dec '25 - 11:48am

    “I think the lesson to be learned about beating Reform in STV elections is to communicate to voters the need to use their preferences”

    We are unlikely to have STV in UK elections any time soon; so there is also a need for those voters who don’t wish to see a Reform government to communicate their preferences to leaders of all political parties who might agree.

    This means forming electoral alliances to promote a single candidate to have a realistic chance against Reform, especially if they from their own alliance with the Tories. At present the left vote is splintered with competing candidates of from Labour, LibDem, Green, and the Nationalist Parties. We might soon have to add ‘Your party’ to the list even though it now looks like their impact will only be minor.

  • Mick Taylor 14th Dec '25 - 1:01pm

    PeterMartin. This is a lesson the Greens must learn as their intervention and campaigning has allowed Reform to take two seats off the Lib Dems by margins significantly smaller than the Green vote. I know in one case they put out leaflets claiming they could beat reform only to ensure the Lib Dems lost.

  • @ Paul Barker “the West Lothian seat has a big Independent vote”……..

    Sorry, Paul, but 13.2% of a 22.2% turnout is not a “big Independent vote”. 77.8% of the electorate obviously decided that staying at home on a cold dark December day/night was the more attractive option.

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