The regulation of theelectricity network is a reserved matter and network upgrades, includingundersea cables to connect the Northern Isles to the mainland electricitynetwork, are a matter for the network owners in conjunction with the regulator,Ofgem.The planned introduction of the British Electricity Trading and Transmission Arrangements (BETTA) willallow for the costs of the new transmission capability which will be necessaryto support the development of renewable energy to be borne by electricity usersacross Great Britain.