Applied for a job, got the job signed a contract. The application form was very long winded for past employment. I accidentally left a small gap by mistake as at the time I stayed at home with my children, but had a very small stint working in the evenings in a factory for just two hours for roughly 6 months, with a 3 month break as the workplace shut due to covid. It wasn’t for me but wanted to try and contribute to household income at the time. As it was such a small stint I’ve forgotten to add to to new job application form and they’ve just phoned me mentioning there’s a gap they’ve found I’ve not declared that I was employed for a few months and will discuss with HR tomorrow and get back to me. It wasn’t obviously a legit workplace DBS needed etc and I have a new DBS which new job just provided for me. Is this something they could retract the job offer for?