A photo gallery doesn’t seem the logical space for political debate but Belfast Exposed, a radical arts space in Belfast, thinks that photography is now political – partly because the police have made it so by disrupting photographers in public spaces.

And, they say that while political debate in Northern Ireland is obsessing itself with minority interest factional concerns like parading, there has to be a forum for wider, more relevant discussion.

I met with the director of Belfast Exposed, Pauline Hadaway, and asked her to outline the objectives of Exchange Mechanism.