Harris became a Eurosceptic, and was chairman of the Bruges Group from 1989 to 1991.
He is also the Director of the Bruges Group a think tank based in the United Kingdom.
He is the current vice president of the euro-sceptic Bruges Group.
Robertson runs the notorious Bruges Group, pledged to opposing European federalism at all costs.
The aim being to have Bruges Groups in every large town by December.
He was a founding member of the Bruges Group until 1991, when he was expelled by its executive committee.
The Bruges Group is a think tank based in the United Kingdom.
The Bruges Group contends that the EU seeks to extend its influence over individual states' right to manage their own affairs.
The Bruges Group is considered to be the common ancestor of the many British Eurosceptic parties and groups that emerged in the 1990s.
From 1991 to 1993, he was Chairman of the euro-sceptic Bruges Group.