The landlord under a short limited duration tenancy F1, a limited duration tenancy or a modern limited duration tenancy is not entitled to recover any sum, by way of higher rent, liquidated damages or otherwise, in consequence of any breach or non-fulfilment of a term or condition of the lease, which is in excess of the damage actually suffered by the landlord in consequence of the breach or non-fulfilment; and any provision of the lease to the contrary is of no effect.