Should we delay wind turbines?

Sir, - Now that the beached oil rig has been refloated after running aground off Lewis, is it not time to think again on such matters?

Soon, we are told, a major decommissioning programme will be starting, involving the movement of rigs into decommissioning yards.

Is it sensible to install offshore windfarms across or near shipping lanes, at least until the decommissioning has been completed?

Does anyone know how long an offshore windfarm is expected to last? Are they really worth the money?