13/04/2011 15:59 BST | Updated 22/05/2015 10:12 BST

Penny Lancaster Publicises Free British Gas Swimming Scheme On Parentdish

Penny Lancaster Stewart, wife of Rod and pregnant with their second child, is encouraging people to take the plunge for free, as part of the British Gas 3 Free Swims campaign.

In this exclusive video the former Strictly Come Dancing Star talks about the benefits of swimming during pregnancy and gets some top tips from six times World Champion swimmer Mark Foster.British Gas is giving away three free swims to their customers (for up to two adults and two children per swim) at 544 health clubs, hotels and leisure centres around the country, until 30th November 2010.

Penny , 39, a model, photographer and qualified fitness instructor, has always been a big swimming fan. As a teenager she swam back stroke at county level for her school in Essex, and has continued to swim regularly throughout her adult life.