Boris Johnson's wife Carrie has shared an adorable photo of new daughter Poppy getting acquainted with her siblings - days after revealing the surprise birth.

Poppy - full name Poppy Eliza Josephine Johnson - was born on May 21, the fourth baby the couple have had together, following a largely secret pregnancy.

Mrs Johnson has said the baby girl - already nicknamed 'Pop Tart' - will be the final child she has with the former Conservative Prime Minister, and that the pair are 'smitten' with her.

Days after announcing the birth, she has shared a new photo of Poppy cuddled up with her siblings Romy, three, Wilfred, five, and Frank, who will be two in July.

In the picture - soundtracked to jaunty music on Mrs Johnson's Instagram Stories - Poppy is cuddled up in Romy's lap, as the three-year-old wraps her arms around her protectively.