Best way to remove locking wheel nut?

[pidsy]

Lost the bloody adaptor so cant get the space saver off.

Help please!

[pidsy]

Its this type so dont think a hammered socket will work...

[pidsy]

Sorted!

Tried the "hammer a smaller socket on" advice then used an impact driver to wind off.

All 4 locking nuts off in less than 5 mins.

Thankyou guys!!
PH ftw!