You could beat the 424 by using a PAR.
Mind you, when Farnborough had a localiser installed (didn't fit the glidepath initially as the thresholds were due to be moved) I made sure it was set up so that the QDM of the localiser was co-incident with the PAR centreline thus enabling the pilots to fly a 'hybrid' LLZ/DME approach but with GP information passed by the talkdown controller down to half a mile ie a pilot interpreted ground controlled approach.(but I didn't tell you that).