Commercial tenants in the UK have a right to apply for relief from forfeiture.
This provides them with the option to remedy any breaches of the lease, including payment of any rent arrears, making any repairs to the property, costs taken to recover them, and costs incurred by a landlord in changing the locks etc.
Once a possession order is granted by court, tenants usually have 28 days to apply for relief - by paying rent arrears or remedying other breaches - or vacate the premises.