Since Prince George's birth in July, the Duchess of Cambridge has rarely been seen in public as she adjusts to life as a mother.
In September, Prince William and Kate spent their first night away their son to attend a black-tie awards ceremony.
The Duchess had previously made her first surprise public appearance since George's birth when she joined her husband as he started the Anglesey Coastal Ultra Marathon in August.
More top news
A teenage boy is being questioned over the attack on a child in a park in Manchester.
Police have released CCTV in a bid to catch the thieves who raided a children's play centre, taking money from collection boxes and a till.
A hedgehog, a parrot, and a dozen dogs are among the pets needing new accommodation after the evacuation of the Chalcots estate.