Has anyone had a City Rover Sprite?

What would be the cause of a gear fault where you can't engage 1st or 2nd gear?

I have not looked yet but I have seen suggestions of gear linkage, clutch adjustments and gear box oil.

Any ideas?

It does sound like a gear linkage to be honest. Can be a pain to get to to be honest on some cars. Had to change them on a few but not a rover. Can take a look for you if you want.