For what it's worth, I was the ABZ radar controller on Friday morning and although the BA, BMI, Eastern, etc did get in it was only after they had also gone around once like the easyJet. Unlike the EZY, they held for a bit and once the weather improved slightly the others who had the fuel to wait made a second approach and got in. Bizarrely, the EZY said he was diverting to Prestwick - not sure why they preferred there over GLA or EDI. The only other one we lost was the Atlantic ATP freighter.
So I don't think the question is about aircraft equipment, more about holding fuel.