Irish tech entrepreneur Mike Lynch yesterday said he would file a claim against Hewlett-Packard for $150m (€134m) in damages over allegations the US company made about his role in the acquisition of his software company Autonomy in 2011.

The war of words between Tipperary-born entrepreneur Mike Lynch and Hewlett Packard over the allegations of accounting irregularities at Mr Lynch’s former company, Autonomy, escalated in advance of the HP annual shareholder meeting yesterday.