Pursuant to section 23(1) of the Landlord and Tenant (Covenants) Act 1995, under a new lease, the purchaser of a reversion is not entitled to rent arrears which accrued before the purchase, unless provided for otherwise in the contract. Which party must the tenant make payment of any arrears to, the current or previous landlord? Where the tenant and the new landlord subsequently agree a surrender of the tenant's interest in full and final settlement of the tenant's past, present and future liabilities, does this apply to any arrears which are owed to the previous landlord?