A restaurant, that is not cleaned often, inside and outside can be eventually shut down for not maintaining cleanliness standard. Nobody wants that for his/her restaurant.
But the main role of the restaurant is to serve meals to customers and to prepare the food, so actually there is no left time for cleaning the ambiance and the kitchen. That is why it is a very good idea in this case to hire a restaurant cleaning company, that provides all the required cleaning services. It is not necessary to use them every day but just from time to time. A company, which main business is to offer such services for restaurants mostly, can be found either online or via the Yellow pages. If you are not familiar enough with such companies, what they offer and their prices, you can always give them a call and ask for more information.
It is good to know how much experience they have in cleaning restaurants and bars, and if their domestic cleaners London have been trained as well. Actually such cleaning companies occupied in offering services to restaurants are operating in London mostly.
Once you have found such a company, arrange for them to come every so often to thoroughly clean your restaurant.
One of the best things that are appreciated by customers is how comfortable and cleaned is the venue and if you maintain your restaurant in consequence to the cleanliness standard, your restaurant will attract a lot of customers.