“The majority of the more modern leases state that you may sublet the flat for a term of not less than one year and not more than twenty years. This subletting must be at a full market rental value and the terms must be no less onerous than those of the lease. There is to be no further assignment or subletting and the subletting must be of the whole of the premises and not part.”
“When interpreting a written contract, the court is concerned to identify the intention of the parties by reference to “what a reasonable person having all the background knowledge which would have been available to the parties would have understood them to be using the language in the contract to mean”, to quote Lord Hoffmann in Chartbrook Ltd v Persimmon Homes Ltd[2009] AC 1101 , para 14. And it does so by focusing on the meaning of the relevant words … in their documentary, factual and commercial context.”
“Two conditions must be satisfied: first there must be a clear mistake on the face of the instrument; secondly it must be clear what correction ought to be made in order to cure the mistake. If those conditions are satisfied, then the correction is made as a matter of construction.”
“… it is sufficient if the court is able to ascertain the “gist” of what has been omitted….Once the court has identified an obvious omission, and has found in admissible background material an obvious precedent for filling it, it should not be fatal that there may be more than one possible version of the replacement.”