You really couldn't make this nonsense up, turn up for work, have water, milk, yoghurt or any liquid confiscated, thus having airside acces only to water to drink for entire shift.
Ok, supposing there is a real threat from liquids, i could be persuaded that tight security was thus necessary. However , cars can be taken airside with their tanks full of petrol, water in washer bottles etc
Why is a member of security staff deemed capable of judging what is secure/safe and what should be confiscated? Assuming they have undergone some checks before they are let loose why can't the rest of the industry have the same 'deemed safe' status?
I could go on listing a long page of ridiculous contradictions brought about by these rules. However, the main effect seems to be to increase the levels of frustration and hence stress in the people who have to put up with them- so well done to the DFT for that, that really helps safety in the aviation industry.