The EU added an "Elgin Marbles clause" to its demands for a post-Brexit trade deal with Britain on Tuesday, raising fears that it would bolster Greek calls for their repatriation to Athens. The demand was revealed in Brussels after the EU inter-governmental talks and as Michel Barnier rejected demands by David Frost, the UK"s chief negotiator, for a Canada-style trade agreement. British negotiators will reject any role for the European Court of Justice (ECJ) in the future trading relationship, it also emerged, opening up another rift between the two deeply divided sides ahead of trade talks in March. EU governments have been revising the mandate for the negotiations, which is meant to be finalised on Wednesday....