Teeterinhead old chap ... I may be off mark ... But I suspect it has something to do with UK food hygiene regulations
So will they be using disposable cooking utensils, pans, baking trays etc then? If not, and if they can be washed by hand, then any argument about food hygiene or the dreaded H&S regs would appear to be weakened. More likely someone has decided they don't have the inclination or time to wash up.
So so very glad I no longer live in, Messes across the Services are becoming more and more like a poor impression of a Premier Inn than a home and welcoming club for Mess members. A curse on which ever idiot signed off on the idea to contractorise messes.