‘It used to be thought that in exercising a contractual discretion accorded to it, in relation for example to a bonus or a share plan, an employer could, so long as it addressed the matter honestly and genuinely, make subjective qualitative judgments which would only be reviewable if they were perverse or illogical. Braganza appears to have changed this.’
Employment Law Blog, 12th June 2017
Source: employment11kbw.com