The house I am in has the sticker I pasted below on the consumer unit.
It "recommends" an inspection 3 years after the prior one. Is this a requirement? Even if it is not required, is it actually a useful recommendation or is it more of a marketing ploy on the part of the electrician?
In certain cases of old or outdated equipment, perhaps a periodic inspection is wise, but I would be very concerned if an electrician knew of a serious problem which required active monitoring but hasn't made efforts to just correct it. (Perhaps there are cases of homeowners who will only pay for the minimum...)