There's a very long technical expert report describing Horizon on the Inquiry website: https://www.postofficehorizoninquiry.org.uk/evidence/expg0000001-expert-r

There's a very long technical expert report describing Horizon on the Inquiry website: https://www.postofficehorizoninquiry.org.uk/evidence/expg0000001-expert-report-charles-cipione https://www.postofficehorizoninquiry.org.uk/evidence/expg000... I have to confess to not having read it, but it's the closest thing I've seen to having the detail we'd all like to understand.