Steve, Some more info on the canopy ejection system, this is an extract from RAF Watton-info,Flying with 527 Sqdn by Ralph Swift.
The Watton Canberra‘s were B2’s and had ejection seats for the single pilot and both navigators but in both cases it was a requirement to get rid of an explosive canopy prior to ejection. In the case of the training Canberra, the T4, although the navigators had ejection seats the cramped cockpit for both pilots did not afford enough room for ejection seats and the only way out for the pilots was to slide the right hand seat backward, open the side door in the fuselage and bale out conventionally. In a situation that required the pilots to abandon the aircraft it was a very hit and miss affair and when the Canberra later had a problem with runaway tailplane actuators I think it proved impossible to get out in the time available.
Reference the tailplane trim actuators, the wiring for the actuator was unbroken i.e. one continuous length with no plug breaks from cockpit s/w's to actuators as part of the fix for the runaway trim. Changing this wiring was not fun as you can imagine.
