The Duchess of Cambridge has written a letter to a London hospital to express her support for its work during the coronavirus pandemic.

Kate is patron of the Evelina London Children’s Hospital and wrote to staff at the institution, which is also treating Covid-19 patients, to say she is thinking of them during “this hugely difficult time”.

In an interview last week, the duchess said the “extraordinary job” NHS and other frontline workers are doing will dramatically change how society will value them in the future.

Kate said in her letter: “It is heartening to know you are still very much open for business and continuing to provide expert care to sick children despite the challenging circumstances.

“You are all truly inspirational and I know how much you will be there for these families, as you always have been.

“You are now facing the additional pressure of caring for adult Covid-19 patients, but it is a testament of your support and commitment to your patients that you are all pulling together to ensure they will have the best possible care.

“Whether working on the front line, or behind the scenes, you will be having to juggle these pressures and manage both your professional and personal lives.

“Please look after yourselves and each other and know the whole country is behind you.”

Kate last visited the Evelina, in central London, at the end of January to learn about the creative workshops run by the National Portrait Gallery for young patients and their siblings.

Evelina London, which is part of Guy’s and St Thomas’ NHS Foundation Trust, provides comprehensive health services to children and families from before birth, throughout childhood and into adult life.

The duchess also wrote to the Action for Children charity, which helps vulnerable children and young people in the UK, to thank staff for their hard work.

Kate, who is patron of the organisation, expressed her appreciation during “this hugely unsettling time”.

“Whilst you are having to adapt your services during this pandemic, it is heartening to know that you are still able to provide vital support to children and families across the UK, who need your help now more than ever,” she said.

The duchess added: “You must all have particular concerns at the moment for children who are especially vulnerable and who are spending time in home environments where they are at risk of violence, abuse and neglect.

“I know you will be doing all you can to look out for them. Your willingness to be there for those that need your help is truly humbling.”