Patrick Morris and Huw Cordey, who between them have made a number of TV series including Life and Planet Earth, will give a talk on the making of BBC Earth’s 3D film Enchanted Kingdom.

Tickets costing £15 are available for the event on January 28 with all proceeds going to the water charity while a raffle on the night will raise further funds.

Morris said: “This is a great opportunity for me to share our struggles and triumphs over our respective years of filming.

“There is a lot of work, thought and planning that goes on behind the lens to make sure our audience sees what they do.

“I am especially pleased that we are supporting Just a Drop, given that water has had a huge impact on many of our film-making experiences - something I will be highlighting during the talk.”

Fiona Jeffery, chairman and founder of Just a Drop, said: “I am thrilled that Just a Drop is able to host such a prestigious event at the Royal Geographical Society and open this up to our many supporters.

“The insight Patrick and Huw can share will make for a fascinating and enlightening evening.

“It’s also wonderful that funds raised from this event will help us to continue to transform the lives of communities worldwide through the provision of clean water and as Patrick will illustrate, water has a huge impact on our daily activities, no matter where we are in the world.”

To buy tickets search for Life Behind the Lens at eventbrite.co.uk.