UK labour union Unite said on Wednesday that its members employed by pharmaceutical company GSK Plc will stage a series of walkouts throughout May in a dispute over pay.

Unite said its 750 members voted for strike action, having rejected the company's "significantly below inflation rate pay offer" of a 6% pay increase and a one-off lump sum of 1,300 pounds ($1,614.7).

($1 = 0.8051 pounds) (Reporting by Aby Jose Koilparambil in Bengaluru; Editing by Devika Syamnath)