Muscat v Smith
 EWCA Civ 962;  1 WLR 2853 (CA)
Following the transfer of a landlord's interest to a new landlord, if the new landlord sues the tenant for rent arrears which arose under the old landlord, the tenant may set off against the claim
any counterclaim they had against the old landlord, e.g. for damages for breach of covenant to repair.