i think people will find
that jbl are used in a lot of studios but not necessarily in the uk.
just for the record.
a little story , 2 years ago i was working with a band over 2 months and we used 4 very well equipped studios and i can list the monitors.
studio a = main monitors tannoy 15" coaxials - near fields ns 10
studio b = main monitors dynaudio air system - near fields ns 10
studio c = main monitors jbl century golds - near field mackie hr
studio d = main monitors adam ribbons - near fields dynaudios
i have seen a few pairs of atc's , many more dynaudios and jbl's or tannoys.