@ Ian W
Gailes Type 7/14 blips were so wide, they'd never have got within 10 miles of each other anyway
I last did Area Radar in 1974 @ Manch but even then, if I'd not established both acft on headings before level changes, I'd had a sharp blow to the back of the head from my mentor. I'm sure there'll be many ATCO's who'll recall the examiner who 'chopped' many people for similar stuff