Interstingly there also appears to be some software upgrade to the X-Ray machines. It would appear that they can x-ray and declare safe a whole case of (insert liquid drink of your choice here) that is being delivered to the expensive shop, but the same machine is incapable of carrying out the same test to a single bottle that you try to carry through.
I wonder if I pop along to the local cash and carry and buy a case of my favourite soft drink if I can get through claiming it as a delivery (to my locker)