hi ive lost the locking nut for the wheels on my citroen c4
any 1 know how l could get a replacement or get it sorted thanks jordan

dealership or ebay perhaps

Your first stop should be your local Citroen dealer, Citroen may have kept a note of the key you need and the dealer may be able to supply a new one.

If all else fails, get an old socket which is slightly smaller than you lock nut, you need a heavy hammer and then belt the socket onto the nut to remove it. You need to get either new lock nuts or wheel nuts to replace the ones you are removing with brute force.