You need to check with your council, In London you just need proof there is no one living there, in Hampshire, utilities can be left on but all furniture must be removed.
i think you only get 6 months free council tax exemption if the owner has died and you get 6 months free while probate is going through, otherwise i believe you have to pay 50% of the poll tax if it is a rented property.
I think you will find that 'Empty Property' means absolutely empty of all furniture and possessions: including items such as fridges, electric stoves etc.