The UK government said the money would go towards making buildings more energy-efficient and roads cleaner but opposition parties say it's too little.
UK PM Boris Johnson goes into isolation after contact with a person infected with COVID-19.
The three European leaders each talked to US President-elect Joe Biden on Tuesday, vowing to work together on "shared priorities" including climate change and multilateralism.
Britain's prime minister and the president of the European Commission will discuss the relationship between the UK and EU after 2020.
"As Saudi Arabia is to oil, the UK is to wind – a place of almost limitless resource," said UK PM Boris Johnson, outlining plans for a post-COVID green recovery.