Susan, who used to run St Keverne Post Office from 2004 until 2012, said: "I lost my home, I lost everything, literally I lost everything, and most of all I lost me." "We are replacing the Horizon system and building a flexible, resilient and trusted system that supports postmasters, strengthens our partnerships, and improves the customer experience." The Horizon accounting system was developed by Fujitsu and rolled out in Post Office branches from 1999. "Horizon is a highly complex system made up of about 40 different applications, which currently supports nearly 10,000 Post Office branches across the country. "We continue to work with the Post Office to maintain Horizon and deliver critical services, as they move to a new delivery model.