Make your mind up. Half shaft/uj? Broken or not the landys wasted on you. You need to get diff lock sorted to trouble shoot the problem. If diff lock is in it'll move weather the problems front or back.
if the front CV joint is in bits it will not drive , we have removed all the bits from the hub ordered a new one which will be fitted tomorrow . job done
don't forget to grease it! Do the other one while you're at it!
