Royal Mail considers ways to replace pension plan after union backlash

(Reuters) - Britain's Royal Mail is looking at ways to replace the final salary pension scheme it plans to scrap at the end of March 2018, after a backlash from unions including the threat of possible strike action.Royal Mail, the postal service privatised in 2013, said on Friday it was one of only a few major companies to still have staff in a defined benefit scheme, a type of pension that pays out according to workers' final salary and length of service.The Communications Workers Union (CWU) o