Who decides how much money must be deposited as security for expenses?

The parties can agree between themselves the sum to be given as security but this is uncommon. Usually, the surveyors will decide the sum to be deposited and will include this in their award with details of when and how the money is to be returned to the owner giving the security. If either party is unhappy with the amount determined by the surveyors, they can refer the matter to the Third Surveyor but only before the surveyors make their award. Once the award has been served, the parties can only appeal the award in the County Court.