I’d love to see this. It’s currently not possible with any built in HA integration to get a (meaningful) daily forecast for the UK. Was pointed at this thread from my comment on this here: Openweathermap forecasts not general daily forecast
If there are any interested HomeHabit users, I’ve raised an ‘Idea’ for HomeHabit to support the daily forecasts if you want to vote for it here: https://community.homehabit.app/t/support-for-openweathermap-one-call-api-daily-forecasts/2099