Reform is a spinoff, yes, in the same way that UKIP is a spinoff: it's a party consisting of people who didn't/couldn't/wouldn't get selected as conservative MPs, plus on the odd occasion one or two who left (Lee Anderson, who is terrible, awful, self-serving and alarming, and before him for UKIP Douglas Carswell, who was largely better characterised as a nice enough bloke who was completely wrong)