There’s nothing like a spot of bracing sea air in the sunshine to lift the spirits.
His wife Carrie posted photos online of children Wilf and baby Romy against a scenic backdrop of the beach at low tide in West Sussex.
Wearing a red woollen hat and jeans, Mrs Johnson, 33, smiled broadly as she carried her one-month-old daughter in a cloud-patterned papoose.
Proud mum: Carrie Johnson holds baby Romy as son Wilf heads off to explore
Meanwhile Wilf, 20 months, enjoyed exploring the puddles in a red dinosaur jumpsuit and playing with the family’s dog Dilyn.
In another picture, the Prime Minister’s silhouette could be seen in the distance on the beach, wearing his signature beanie hat.
The Johnsons are believed to have stayed in the fashionable resort of West Wittering which counts Rolling Stones guitarist Keith Richards among its celebrity residents.
The family previously enjoyed a late summer break in Marbella at the Spanish villa of friend and Cabinet minister Lord Goldsmith.
Beach pals: Wilf and Dilyn the dog strike matching poses on trip to seaside