In this new series Clare Balding revisits some of her favourite and most memorable guests. Eleven years ago she joined Tom Isaacs in West Wales as he walked the entire coastline of Britain in an attempt to raise money and awareness for research into a cure for Parkinson's disease. Tom had been diagnosed at the exceptionally young age of twenty-seven but has always been determined not to let his condition get in the way of him leading a fulfilling and productive life. Clare now walks with Tom and his wife Lyndsey, along the river Chess, close to their home just outside London. Producer Lucy Lunt.