Was sent this today, indirectly related to topic!!
FODC 30-2003 Mobile Phones
Use of cellular telephones during aircraft refuelling
.... the CAA is satsified that fuel vapour ignition, due to the use of cellular telephones on the aircraft, is unlikely when passengers are on board during fuelling operations. This position takes account of the energy levels of the cellular phone transmissions, absorption and attenuation of that energy within the cabin and the seperation that would exist between an onboard cellular telephone and an external fuel vapour source.
... it is proposed to combine CAP74 and CAP434 "Aviation Fuel at Aerodromes" into a new document and to remove the text relating to the use of telephones by passengers on board during refuelling operations. Pending the revision, operators may relax their current restriction and permit the use of cellular phones inside the aircraft during fuelling operations":
confused: