edge referendum on the new EU Constitution on June 1, said all countries in a similar position should get the same relief. "It can't be that just because of its name one country has a special arrangement," he said. He suggested ministers should also re-open talks on farm spending -- frozen at current levels for the next seven years in a 2002 deal. But Britain stood its ground, maintaining the rebate was not up for negotiation, a UK Treasury source told Reuters. "The rebate is fully justifiable," the source said.