The situation in the UK has changed now. The UK Civil Aviation Authority would not permit the provision of a radar service eg vectoring for ILS by the person responsible for aerodrome control even though they had ratings for both ADI and APS in 2010.
They have conditionally relaxed this rule now and will allow some airfields to use the tower controller to vector for the ILS using the ATM however this must be approved by the CAA after a 'safety case' has been submitted and of course, the tower controller must have an APS rating. This may be because the airfield is not busy all day, or just during less busy periods.
Last edited by chevvron; 5th Oct 2017 at 13:42.