Prince William makes Kate Middleton promise at first royal engagement since cancer diagnosis

The Prince of Wales issued a message of support to Kate during his first royal engagement since her cancer diagnosis was made public.

While visiting a food distribution charity in Surrey on Thursday (April 18), William received heartfelt cards of support for his wife and the King, who is also battling cancer. William appeared touched by the messages from volunteer Rachel Candappa.

When she asked about Kate, telling him to “take care of her”, William replied: “I will.” The future King smiled, joked and appeared relaxed as he toured Surplus to Supper, based in Sunbury-on-Thames.

READ MORE: Prince William and George spotted in first public outing since Kate's cancer announcement

Mrs Candappa described William as 'very down to earth,' explaining: "I was at home at 8.30 last night and I thought I had to do something this is a chance to give a card directly to the palace officials. I didn't think I'd be able to give the cards to William. I said 'can I shake your hand?', I loved it, he was very down to earth. I'm never washing my hand again.

"He pointed at the food and said ‘that’s spaghetti hoops’ and I asked ‘how do you know about spaghetti hoops and he said 'I've got children'."

While at Surplus to Supper, William learnt about the charity’s work supplying foodbanks and other organisations with donated produce, toiletries and meals made on site. William washed his hands and donned an apron to chop celery for a huge meal of chilli-con-carne which will feed hundreds, and joined a van crew delivering food to a nearby organisation.

Kate announced almost a month ago she has begun receiving cancer treatment in an emotional video that received widespread praise for its candid nature. The prince showed his appreciation when he