The Canberra PR9 Safety Speed was 150kts for 90% rpm (8000lbs thrust per side) and went up tp 170 if you used full power (11,250 per side). 90% rpm was the norm, but it accelerated so quickly if you used full power that it was a struggle to get the gear up and locked in time, even when heavy.
We did practice assy approaches on a regular basis. IIRC we had to do 12 per quarter; 6 each of Viz/Inst and a mix of landings and overshoots. Given that we couldn't roll from an assy landing, this was the harder stat to maintain. The guys up front in the nose probably found those 6 overshoots per-quarter uncomfortable, especially when in the visual cct halfway round finals. More so when a lot of the guys on 39 had only ever flown a bit of T4 before being let loose in the mighty PR9. Lots of potential to screw it up if you didn't fly it correctly by levelling the wings and ensuring you maintained directional control (ball!!). That is probably why we used a VCH of 600ft. At least we had a powered rudder to help, but always flew these with the trim re-centred.