‘ThisOldThang’, Starmer’s dad was self employed. He might have called it ‘his factory’ but it was a rented workshop and he was the only worker! See this quote from ‘Labour Heartlands, a site critical of Starmer.
‘Starmer’s father, in reality, operated the Oxted Tool Co. His own independent toolmaking enterprise until the 1990s. By all accounts, he was a proficient self-employed tradesman, devoid of superiors or overseers, operating from a rented workshop on an industrial estate rather than a conventional factory setting.’
Similar can be read elsewhere.