on 05-02-2013 13:56
As far as I know 0333 numbers come from your allowance but the others are chargeable calls.
on 05-02-2013 14:31
Typically 01, 02 and 03 numbers are included, however this is a service number which connects you to another number... so I assume it is an international calling line.
If you use this number to avoid paying O2's call rates you could find yourself in a spot of bother.
Hope that clears things up.