The Court of Appeal held that a tenant had not properly served a counter-notice relating to a rent review and, therefore, had to accept the landlord's proposed rent in the initial rent review notice. The tenant sent the counter-notice to the landlord's registered address as stated in the lease. The address had been changed. The tenant's solicitor had been advised of the change and the tenant was deemed to have this knowledge and had, therefore, failed to serve the notice at the landlord's "last known place of business".