I would say that you most probably have a secured period tenancy. This means that you have security of tenure.
Any agreed terms regarding repairs? It is generally the case in commercial lettings that the tenant takes all responsibility for repairs which is specified in the lease. Unless there are agreed terms this will not be your responsibility to repair. Having said that, without express terms you cannot state that it is the landlord's responsibility to repair either.
Who has been undertaking repairs in the absence of agreement? This will represent a course of dealings/conduct which may then imply who should repair.
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