Hello, need to get a tyre replaced and have lost locking wheel nut key

Been to ford and they wasn't any help what so ever, been told you can usually get them off using another socket to force it of? but with the ST nut its not possible because of the size of it?

Been looking at getting key from ebay etc but they all seem different....

Any info would be great or happy to pay someone to come get them off.
(i will buy new set)

located newton abbot, Devon

Thanks