its not like a single locking wheel nut on each wheel, its a full set of like, special size wheel nuts i cant explain them really! maybe rob knows! i bought them from him
I doubt you'll get the nuts off without damaging them as they are a 7 sided nut, so unless you have the proper removal tool the only way would be to bang a normal hexagon socket over the end, damaging them in the process.
£20 will get you some spare nuts and a new tool though......