When the Bolton footballer Fabrice Muamba collapsed on the pitch last month there was some surprise that someone so apparently healthy could succumb to heart disease. But every week in the UK, 12 young people die unexpectedly from similar conditions.
John Andrews reports on how a couple from Paignton whose son died at the age of 21 joined other families in Taunton for a campaign to get more young people tested.
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It will be mild and cloudy today with patchy rain. Light rain will continue into tomorrow, turning heavier in the afternoon.
Bob Crampton has the Thursday weather.
Bob Crampton has the latest weather forecast.