Surprised English tourists nabbed a photo of a relaxed-looking Boris Johnson, clad in shorts and tennis shoes, while visiting an indigenous cultural centre north of Cairns.

The controversial mayor and former Spectator editor is in Australia to deliver the opening night keynote address for the Melbourne Writers Festival on August 22.

He will also chat to political commentator Annabel Crabb.

The Mossman Gorge Centre offers guided walks as well as a popular bus service to numerous swimming holes along the gorge.

The Hartley family from Blackpool said Mr Johnson was more than happy to pose for a photo.

Staff at the centre said they hadn’t seen the elusive mayor. 

Image via Getty