In the UK, and the rest of Europe, if at 1000ft/FAF the RVR or visibility is below the landing minima then the approach must be discontinued. There is no pilot discretion to "take a look" however, you may continue if he visibility decreases once you have passed the approach ban point. This concept has been adopted in Australia for CAT 2/3 operations.
Last edited by StudentInDebt; 6th Oct 2016 at 13:17.