Simple answer - Yes - presume you are talking about a residential property

Don't know if it's any help but in Scotland the Housing Act Scotland 2006 and the Housing Regulatory Authority under the auspices of the Audit Tool used by the Housing Regulator the Scottish Housing Quality Standards, require Fixed Electrical Installation Checks at three yearly intervals; this for Registered Social Landlords (RSL's). Private rented properties as declared by paul.skyrme earlier in this dialogue, private residences (your home owned or bought by you) are not captured by these Regs, unless you intend to rent the property out.

Depends on what your businesses does, company policy etc (our is every 3 years) and what the terms of your rental agreement are with the landlord. We are responsible for the property that we rent.

I wonder if it would help if you were to identify whether we are considering 'domestic' or commercial premises? I would say that in a 'domestic' situation, that any responsibility is likely to sit fairly squarely with the landlord. However, in a 'commercial' situation, the answer might well be determined by the terms of any agreement e.g. a full repair and maintenance agreement might indicate that any responsibility might rest with the tenant rather than the landlord.