LONDON, April 9 (Reuters) - Britain should let European Union fund managers have access to British-based clients after Brexit even there is no reciprocal arrangement for British firms, a leading trade body for hedge funds and other alternative asset managers said. The London-based Alternative Investment Management Association (AIMA) said in a report released on Monday that Britain should “generally opt for an approach that prioritises openness over reciprocity”. The report reiterated AIMA’s previous calls for a deal with the EU based on regulatory equivalence.