Prince William will be taking on more work after Prince Andrew announced his withdrawal from public duties.

In an article, he wrote for Daily Mail, royal expert Richard Eden shared his conversation with one of his sources, who said that Prince William plans to help emergency services charities through his and Kate Middleton’s Royal Foundation.

“William worries greatly about the care given to our lifesavers and believes the support given to people working in the NHS and other emergency services needs to be looked at closely. He wants this to be at the center of the work his foundation gets involved in,” the source said.

The Duke of Cambridge was reportedly deeply moved by the two years he spent as a pilot in the East Anglian Air Ambulance, during which time he donated his salary to the charity that funded the service.

Last month, the Duke of York announced his decision to step down from the organizations in the same field including the Yorkshire Air Ambulance and Police Treatment Centers, which cares for officers of different ranks in need of rehabilitative support.

“These are the kind of groups William is particularly passionate about,' I'm told. 'They are likely to be among the organizations William and his foundation may reach out to in the near future,’” Eden said.

Meanwhile, Prince William also made headlines this week after he paid tribute to his grandparents, Queen Elizabeth and Prince Philip.

In the BBC Christmas special “A Berry Royal Christmas,” the Duke of Cambridge also praised Prince Charles and Princess Diana for teaching him the importance of using his royal role to make a difference.

“Growing up both of my parents were hugely charitable. My father set up the Prince’s Trust. He’s involved in so many different organizations. My mother has done her work with homelessness and as you said AIDs and other charities, and I think I’ve grown up in a household which has been very much a case of ‘well, we’re very lucky—you must give back,’” he said.