I was lucky enough to fly the Belfast, attached to the RR tyne, during the 90's.
Take off power was set by the FE, and expressed as a percentage (95% for take off, reduced to 88% after clean up rings a bell)
We used water meth for some limiting takeoff's, and was selected off in pairs, once the aircraft had cleaned up.
Again, during approach and landing power was set by the FE, based upon commands for torque from the PF (a bit like a voice activated autothrottle). This was my first flying job, and as a young FO, experienced FE's would often give you "the power you needed, not what you asked for".
I seem to remember landing on shorter runways, like Southend, and the outboards being set to ground idle over the hedge to ensure a positive touchdown!
Reverse was set by lifting triggers on the front of the power levers....
DH