Monty Don welcomes us to his garden at Longmeadow and offers some timely tips on keeping gardens at their best right through to the end of the season. Carol Klein meets wildlife enthusiast Steve Head to discover more about the wildlife that depend on the habitat our garden ponds provide. And Joe Swift gets an exclusive behind the scenes tour of the private gardens at Eton College, that counts prime minister David Cameron amongst its long list of VIP ex-pupils.