(CNN) British billionaire Hugh Grosvenor, the Duke of Westminster, is donating $12.5 million to his country's coronavirus relief efforts -- and that's on top of the $3.1 million he gave last month.

He's giving $6.2 million to NHS Charities Together to create a foundation to support National Health Service workers and their families, a news release from the Westminster Foundation states, describing the donations in British pounds.

"On behalf of my family and everyone at the Grosvenor Estate, I want to say a huge thank you to all our amazing NHS staff and everyone providing critical frontline services. We are all humbled and incredibly grateful that you are working tirelessly to keep us safe and keep the country functioning," Grosvenor said in a statement

Another $3.8 million will go to coronavirus medical research and development, and $2.5 million will go to charities and organizations that help people facing the greatest economic and social impact from the coronavirus pandemic.

"While the impact of this crisis is being felt immediately, the virus will sadly also affect people's lives long into the future. That's why I'm keen to support the longer-term scientific and socio-economic response to the epidemic. Through these donations, my Foundation will work with a range of fantastic charities and organisations who are able to help vulnerable people in the difficult months ahead," he said in the statement.