UK local elections: what is up for grabs, and what might we learn?

The elections on 5 May will be a key test for Boris Johnson after partgate', but they are often difficult to predict. Here is our handy guide to the polls

Much of the UK will go the polls on 5 May for local and regional elections that will be seen as a key test for Boris Johnson after months of negative headlines over allegedly lockdown-breaking parties. Local elections can be hard to decode, so here is what is up for grabs, and what we might learn.