Kate says she has completed chemotherapy treatment

The video, shot in autumnal colours, suggests how pleased she is to have completed this stage of her treatment.

The Princess of Wales has spoken of her relief at completing her course of chemotherapy, in a highly personal video released by Kensington Palace.

Catherine revealed in March that she was undergoing cancer treatment and has been out of sight of the public for much of this year.

She will be carrying out a few engagements this year, which could include Remembrance events in November and her annual Christmas carol concert. But in an emotional video message she says this year has been "incredibly tough" and "that life as you know it can change in an instant".

This latest update on Catherine's health sends a positive message about her progress, but there is a long road still to go.

Kensington Palace has indicated it is not possible at this stage to say whether she is cancer-free.

The princess describes the "stormy waters" of her experience of cancer as "complex, scary and unpredictable".

"With humility, it also brings you face to face with your own vulnerabilities in a way you have never considered before, and with that, a new perspective on everything," says the princess, in an unusually personal video filmed last month in Norfolk.

The video, shot in autumnal colours, suggests how pleased she is to have completed this stage of her treatment.

"As the summer comes to an end, I cannot tell you what a relief it is to have finally completed my chemotherapy treatment," she says, seen driving and walking with her family.

The princess is expected to return for a "handful" of visits later this year, perhaps including the annual Remembrance service at the Cenotaph.