Post Office paid £600m to continue using bug-ridden Horizon IT system

Tony Blair was warned about possible problems with the original Fujitsu deal before it was signed in 1999

The Post Office has paid more than £600m of public money to continue using the bug-ridden Horizon IT system despite deciding it needed to be replaced more than a decade ago.

It has emerged that the government was warned about potential problems with the original £548m deal the Post Office struck with the Japanese company Fujitsu before it was signed in 1999.