Although it is not possible to completely remove all odours, planning conditions generally prevent odour nuisances occurring from commercial kitchens.
If you feel that odour from a commercial kitchen, such as a restaurant, or pub, is having an unreasonable effect on the enjoyment of your property, please contact the Environmental Protection Team for advice. We will assess whether the offending kitchen is operating 'best practicable means'. For example, the extraction system being suitable for cooking the types of food and quantity of food. If the premises is already operating 'best practicable means', we have little remit to enforce change.
DEFRA has withdrawn 'Guidance on the control of odour and noise from commercial kitchen exhaust' on GOV.UK, but it contains some useful information and outlines what you need to submit to the planning department when applying to change the extraction system in a commercial kitchen.