On adding this I see the square located top centre has a music publisher logo incorporated into the label design. I also see it on many Broadcast Twelve Super and and Super Dance releases here, as well as Broadcast after a certain (later) date - replacing the globe.
My curiosity has been piqued - can anyone enlighten me about this ? (EDIT: Looking elsewhere I'm reminded music publisher logos in a square are not uncommon; e.g. Decca. I'm just surprised to see the label logo so radically altered.)