By Kylie MacLellan LONDON (Reuters) -Britain will face more strikes by workers demanding higher pay after meetings between ministers and trade unions on Monday failed to end a wave of stoppages across sectors from healthcare to transport. More than 10,000 ambulance workers will walk out on Wednesday as planned, the GMB union said in a statement, after talks with health minister Steve Barclay failed to produce a breakthrough. “There was some engagement on pay – but not a concrete offer that could help resolve this dispute and make significant progress,” GMB national secretary Rachel Harrison sa…