From the HSE guidance booklet on the 1992 workplace regulations...
"Where workers regularly eat meals at work, suitable and sufficient facilities should be provided for the purpose. Such facilities should also be provided where food would otherwise be likely to be contaminated. Work areas can be counted as rest areas and as eating facilities, provided they are adequately clean and there is a suitable surface on which to place food. Where provided, eating facilities should include a facility for preparing or obtaining a hot drink. Where hot food cannot be obtained in or reasonably near to the workplace, workers may need to be provided with a means for heating their own food (eg microwave oven). Canteens or restaurants may be used as rest facilities provided there is no obligation to purchase food."
and
"An adequate supply of high-quality drinking water, with an upward drinking jet or suitable cups, should be provided. Water should only be provided in refillable enclosed containers where it cannot be obtained directly from a mains supply."
So... the cup thing is bang out of order unless they have fountains. At first, I thought "fair enough; if they only have plastic cutlery, which is shitty anyway, in the canteen what's the problem charging if people are using it for home cooked meals - bit mean, but able to be reasoned". Then I thought about it a bit more, and yeah, bunch of tossers.