By Jon Robinson Tetley, one of the nation’s favourite tea brands, is braced for further disruption as a major row over pay continues. The GMB Union has announced 12 more strike dates which will see almost 150 workers walk out in a dispute over what it describes as “poverty pay”. The dates of the planned industrial action are expected to take place over the next two months and will be confirmed in the coming days. GMB organiser Paul Clark said: “These hard-working, loyal and skilled, predominantly women workers have been backed into a corner by poverty pay and bullying bosses. “They’re fighting…