Smarta 100 winner Sara Murray founded and sold Confused.com, then went on to found Buddi, one of the most popular GPS personal tracking systems in the UK. It's massively helped parents of toddlers, people with dementia and local councils. Buddi attracted impressive initial investment of £1m from the likes of BAA and former Barclays and BAA chairman Sir Nigel Rudd.
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Watch our video interview with Sara