I regret to inform you all that imperial units will not, in fact, be returning, despite being much vaunted as a Brexit Benefit by Sir Jacob Rees-Mogg.
The reason for this is that they asked the People how they should be reintroduced and the People said 'Are you MAD?'
https://www.gov.uk/government/consultations/choice-on-units-of-measurement-markings-and-sales/outcome/choice-on-units-of-measurement-consultation-response
Still, we've got all those other Brexit Benefits to be luxuriating in, so this one is no real loss.