A dispute over the level of access being given to Denis O'Brien's experts for their inspection of computers of a PR firm involved in an alleged conspiracy against the businessman will have to be heard by the High Court later this week.

Lawyers for Mr O'Brien returned to court today to complain Red Flag Consulting, and a number of directors and employees, were in breach of an order made last Friday allowing for "forensic imaging" of computer files to ascertain who is involved in the alleged conspiracy.

Mr Justice Colm Mac Eochaidh fixed next Friday for the hearing of the latest dispute after he heard an application lawyers for Mr O'Brien, for orders requiring the company to comply fully with last week's High Court order.