London is Labour’s to lose with the party controlling two-thirds of councils, most with thumping majorities.
If the Conservative’s had a good night, they could look to put pressure on outer boroughs such as Merton and Croydon. A bad night could see them lose control of Wandsworth – a council they’ve controlled since 1977.
The Liberal Democrats – who control three of the city’s 32 boroughs – will need to make significant gains to really threaten Labour in Haringey and Southwark, although the party has a strong history in both areas, controlling the former as recently as 2005.
And the Greens? They’ve performed well at the local level in recent elections, most recently stealing a council seat from the Conservatives in a Dorset by-election.
Labour will be hoping that in Sheffield, Burnley and Reading, the Greens don’t steal a few councillors from them due to the Green’s solid foothold in these areas.
What is at stake in Wales?
Labour have a majority in a third of Welsh councils, but with all seats up for grabs, it isn’t impossible for them to lose seats in Cardiff or Port Talbot, where the party’s long-term control has waned in recent years.
Similarly the Conservatives could easily lose their one majority in Wales – Monmouthshire – if just two seats are taken from then, although they’d comfortably remain the largest party.
The Conservatives are the largest party in just two of 22 other councils, Denbighshire and Vale of Glamorgan, although they are not involved in the coalition of the latter.
Plaid Cymru will hope to maintain their majority position in Gwynedd, but also bring Anglesey, Carmarthenshire and Ceredigion into the fold.
They are currently the majority partners in each of these, but just two additional councillors would give them over half the members needed.
What is at stake in Scotland?
Outside of the islands, no party has an absolute majority in any Scottish council.
The Scottish National Party is the largest party in around half of the mainland councils and polling suggesting greater support for independence than five years ago, they are hoping to secure a handful of majorities.