In article ,
Donwill wrote:

Thanks for all the helpful suggestions , I got them out in the end.
For anyone wanting to do the same with a similar cabinet :-
For each drawer, there were two small push-fit black plastic covers that
hid metal tags protruding upwards from the front of the metal runners.
These tags were located into slots in the upside down U channels that
are positioned at the sides of the base of the drawer.
The tags were slightly twisted to hold the drawer on to the slides and
slight untwisting with a pliers and a gentle tap on the tags released
the drawers.

Blimey. Looks like we were all wrong then, afaicr. The lengths people
will go to, to protect us from ourselves! :-)

J.