If you have an office spot in London, you might have found you no longer use it after the pandemic. That is totally fair and increasingly common. Still, even if your office is never used, you should not forget to have it cleaned out on a regular basis. That being said, make sure you hire a professional.
Going in for a simple spring clean on your own might make sense, but you could hire one of the various commercial cleaning companies London has to offer instead like these: https://www.citycentraluk.com/. I recommend you do this, as it can simply lead to a better standard of cleanliness and conditioning. They will catch the little stains and spots of dirt that pass by the eye of a non-professional.
Whether you intend to return to the office or sell it on, keeping it clean is essential.