I’m asking because I’ve never been this old before, so it’s the first time I’ve got to this stage 
I’ve been advised that most people go back 10-12 years on their CV and can delete jobs they did 20 years ago.
Is this really true? Is there any chance employers will wonder if I’m trying to hide something?
Also what happens if you get one of those job applications where you have to fill in an application form? (I hate those ones!)
I do boring standard office jobs, nothing fancy.