The airborne deterrent was trialled for two weeks in July 62 as Trial 448 and in spite of picking mid-summer the weather caused quite a few problems but I think the main reason it was dropped was the expense. As well as the fuel used there was a considerable amount dumped in order to get the Valiant tanker back on the ground to be ready for the next refuel with limited tanker availability.
I was a Cpl/Tech Radar Fitter on 214 Sqdn that carried out the tanker side of the trial. What you referred to as ‘limited tanker availability’ is an understatement of immense proportions.