Lord Hutton has launched an inquiry into the source of the leak after the Suns political editor Trevor Kavanagh obtained details of the report prior to its publication.
A spokeswoman for the TSO said that it would fully co-operate with Lord Huttons investigation into the leak as well as conduct an internal inquiry.
TSO stands by its procedures and can confirm that for all staff involved in the publication of the Hutton report, TSO followed the strict vetting procedures approved by HM government, said the spokeswoman.
She added that that there was no evidence to suggest that its security measures had been breached and that all relevant staff had signed the Official Secrets Act.
Related stories
Latest comments
"Bit weird. From what I've heard, things started to go wrong when their trade customers found out they put a B1 printing press in and went from a supplier to a competitor......"
"Sad to see another print company facing financial trouble. The industry is tough, and this highlights the ongoing challenges many are facing. Hope employees and customers get clarity soon."
"Not surprised, businesses need to prepare for these attacks rather than thinking that they're going to avoid them. At the very least, data needs to be fully protected with air gaps in place..."
Up next...

Recreating an icon
Killer app: Moss vamps up Monroe show

'Fellow premium provider'
Moss expands UK offering with Rocket Graphics buy

100,000 copies in first run
London Daily Digital launches monthly print edition

Print and post-press investment