reference the post from nimmer. I believe and have heard substantial rumours that there is also a similar procedure in force in Northern Ireland and this has been the case for some time. Allegedly controllers from Belfast International (NATS) routinely vector inbounds to the ILS at Belfast City (NATS Solutions) during short staffing at Belfast City with the blessing from both Prospect and SARG. Allegedly there is no formal training undertaken or assessed for said routine practise. Not quite sure what would happen in the event of an incident where a controller is vectoring an aircraft to an airfield where they don't hold a validation but thats one for the grey wig brigade I suppose!