Worth reminding about this site:
Tatjana van Vark ~ Navigation and Bombing System NBS
I have Valiant Pilot Notes and it refers to Aircraft Destructors in paragraphs 135 and 136 of part I.
It says there were two destructors 'stowed in containers on the outside of the pressure cabin under the canopy fairing and just aft of the sextant dome. Access to them is obtained by removing the sextant dome.'
'The most effective position of application of the destructors is on the top of the fuselage over the fuselage fuel tanks, choosing tanks which are still fairly full of fuel. The destructors should not both be fitted above the same cell, and each should be about 2 to 3 feet from the centreline. The positions of the cells can be judged from the relative positions of the bomb hoists....... The method of application is covered in Part V, para 21.'
Part V, para 21 says: All but two crew members should evacuate the aircraft. The two remaining crew should remove the sextant dome and then one climbs out on top of the fuselage whilst the other stands on the chart table, unseals and opens the destructor containers and passes them out to the other crew member and climbs out too.
Each crew member moistens the destruction suction cup and applies the destructor in the selected position (as decided above). Then, 'retaining a grip on the flyoff levers, the crew members remove the transit and primary safety pins and then, at a pre-arranged signal, release the fly-over levers.
Both crew members leave the aircraft as quickly as possible and take cover. A built in time delay allows 60 seconds between releasing the fly-off levers and the firing of the destructors.