In this case, a party (guarantor to the lease) argued that the tenant had surrendered its lease automatically by 'operation of law', and the landlord had, by its conduct, accepted that surrender.

The High Court found that looking at the landlord's behaviour as a whole, it had not accepted the surrender; it had merely been protecting its interest in the property

The case? Padwick Properties Limited v Punj Lloyd Limited [2016] EWHC 502