By Anirudh Saligrama July 8 (Reuters) - Nearly 900 Amazon AMZN.O workers at a warehouse in Britain will stage a strike for three days in the coming week over a pay dispute, labour union GMB said on Saturday. Strikes have been called in several industries in Britain in recent months, including by nurses, teachers and transportation workers in response to inflationary pressures. On Thursday, trade union RMT said the staff of the London Underground will strike from July 23-28 in a long-running dispute over pensions, job cuts and working conditions.