any time on any of the ordinary assured grounds should this be satisfied using a Section 8 notice under the Housing Act 1988. In most cases, if a Section 8 notice is served 14 days' notice must be given in order for the notice to be valid. Comparison to assured tenancy The only potential landlord's disadvantage of the assured shorthold tenancy is the right of the tenant to refer the rent initially payable to a rent assessment committee; which is now called the First-tier Tribunal (Property Chamber – Residential Property). However, it can reduce the rent only if it is "significantly higher" than the rents under any other comparable AST. In this unusual scenario in which the landlord has been able to agree a rent substantially higher than market comparables of the same kind of accommodation, the landlord can serve a Section 21 notice before or after the tenancy has begun stating it is not to be an assured shorthold tenancy, where no rent assessment application has been made. In other regards, except security of tenure, as a subset of assured tenancies, ASTs follow the definition requirements of assured tenancies, e.g. which includes maximum and minimum rent levels to exclude the most unusual extremes. See also Buy to let Notes and references Notes References Housing in the United Kingdom English law English property law Tenancies in the United Kingdom