"The food parcels, and The Duchess's messages, will be delivered directly to vulnerable women on the streets by One 25's "Yellow Van" - part of their outreach programme", The Palace wrote on Instagram.
Meghan declared she was now "in charge of the banana messaging", and wrote messages including "you are strong", "you are loved" and "you are special" - each with a little love heart.
Meghan writes messages on bananas to sex workers.
Harry and Meghan then rounded the day off by checking out a kids' boxing charity called Empire Fighting Chance, which uses the sport to help turn children's lives around.More news: Northwest measles outbreak revives debate over vaccine laws
While the royal couple look a little taken aback at first, neither of them seem particularly phased - Meghan laughed it off while Harry goofed around a bit. "I thought it was the most incredible idea, this small gesture".
'Meghan is focused on calm and positive energy around the birth - she's a big believer in that, ' the royal insider told the magazine.
Talking about her own past Sam, who was originally from the north of England, said: "I was groomed into prostitution from 14 or 15".More news: Russia Regrets Washington's Expected Exit From Key Arms Control Treaty
CEO Anna Smith said Meghan's gesture "really touched me".
Father-to-be Harry joked to the nursery staff: "How do you keep them all under control?" before adding to the youngsters: "You know you guys can run anywhere you like?"
"The Duchess of Sussex will become patron of four organizations that reflect the causes and issues with which she has always been associated including the arts, access to education, support for women and animal welfare", the palace tweeted.More news: The Fed Rules in the Market’s Favor
Markle and her husband, Prince Harry, were recently welcomed to the English city, which is about 120 miles west of their London home.