Speaking as a retired bleep (and therefore know sod all about artillery), even I know that FH70 was retired by the RA over 10 years ago! The FH70 is as relevant to the RA as the Jaguar is to the RAF today.
Since most military weapon systems are operated by NCOs rather than officers, it's a bit worrying if the officers can't get it right. No wonder there are blue on blues. One might thank God that nukes are/were under officer control, but I'm not so sure about that.
Still, in a world where a (RAF) Phantom could splash a (RAF) Jag over Germany (with entirely officer crew), target recognition was the least of the worries if the procedures were so dangerously lax.