Although I worked on Brits, for some reason, which escapes me, I was given the task of carrying out a turn round service on a Belfast. On the flight deck I recall there was a set of tapes which one inserted into a slot. A female voice then talked one through the various checks. Was that unique to the Belfast or was it a feature on other 'modern' aircraft?
I also knew a Flt Eng. who still flew in them when he was 60 odd. He loved them!