Just means a tribunal might rule it to be fair- though think realistically practicalities of this are still going to be worked out via case law. Think some of this is due to how many dismissal cases come down to the process by which someone was dismissed instead of were the reasons fair

think Labour’s spin machine has been good on this tbh, most reports talking about ‘exploitative’ zero hour contracts, when that word isn’t in the legislation- reports of 9 month statutory probation period also bit off as next step document (not the bill) just says this is government preference and