The British Gas Free Swim initiative is part of its £15m, six-year programme with British Swimming and gives customers a free swim at one of 600 local pools from now until March 2010.
British Gas is sponsoring swimming with the aim to get more children and families involved with the sport and support local pools.
Katie Bosdet at British Gas Swimming says: “At British Gas we have an ambition to create a nation of swimming champions. British Gas Free Swim aims to give a helping hand to families to get back in the water and make the most of their local pool.”
Customers can go online to claim a free swim voucher that they can print at home or get sent through the post.
The site features a Google Maps tool to help customers find their local pool.
British gas signed Olympic gold medallist swimmer Rebecca Adlington as the face of its sponsorship of British Swimming last month.