The Post office must have realised the significant spike in wrong balances after the introduction of Horizon. Why didn’t they put someone in the shops to watch the operation of the system in say 3 of the post offices concerned. No doubt the subpostmasters would have been relieved to cooperate and then the wrong balances could have be identified as NOT the fault of the subpostmasters. The PO were only concerned with covering their own backsides at the expense of totally innocent people. This stinks to high heaven and those responsible, at both the P.O. and Fujitsu need nailing and holding to account. As usual ordinary folk are the patsies of the self interested bastards with their noses in the trough.