Web Summit co-founder Daire Hickey has upped the ante in his legal dispute with the tech event venture by filing a second High Court action against the firm and its chief executive Paddy Cosgrave. In the first set of proceedings lodged last November – as Web Summit played host to a 42,000-strong crowd in Lisbon – Hickey, who now runs PR firm 150 Bond, alleged there had been a complete breakdown in relations with his former business partner and that Cosgrave was oppressing him as a minority shareholder. Hickey, a former Web Summit employee and director, has now launched a…