Approach Ban (uk)
Sorry to be late catching up on this one but I wanted to clarify the situation regarding the earlier commented on "Approach Ban" procedure in the UK.For ATC purposes it is known as the Absolute Minima Procedure.
Each airfield has a theoretical calculated RVR minima for an instrument approach other than CAT2/3 ILS.This is to be issued when conditions are below this minima and its main purpose is to act as a final reminder to a crew who may have made an error in calculating their minima.
In the event of the crew continuing no clearances for continuation of the approach or for landing are given however neither are they banned by ATC.We have a number of set messages which state that UK legislation will be contravened by a continued approach but we are not empowered to instruct a crew to discontinue the approach or landing.