Thanks, yes I know the example isn't great (and was also confusing !) it was just current 
Also, I'm not perfect, or claiming to be. It wouldn't honestly have been a big deal between us if he told the truth. I asked because I had done the shopping the day before, kicked my self at forgetting soft cheese, came home next day and saw DC tucking into soft cheese. It was an immediate 'huh?' Moment followed by 'oh, I didn't tell him I've not replaced old cheese with new' I prob would have been a bit eye rolly if I'm honest but that wouldn't have been especially justified and I'm just trying to give a true picture.
It's like a default 'fuck, I'm in trouble, quick, lie!' reaction from him.
He has been severely depressed for a few years which has been chronically shit really. That's when the lying started , as far as I know anyway! The big lies:debt, taking voluntary redundancy and telling me he was made redundant, lying about applying for jobs, getting interviews but not turning up and telling me they never got back to him, plus hundreds of little lies like this.
He has got better this year and is almost back to his old self finally, I'm just "cheesed of" sorry that this lying seems to have persisted.