. For the purposes of regulation 3(1), the circumstances in which a person (“P”) has a reasonable excuse include those where—
(a)P cannot put on, wear or remove a face covering— (i)because of any physical or mental illness or impairment, or disability (within the meaning of section 6 of the Equality Act 2010(g)), or (ii)without severe distress;
(b)P is travelling with, or providing assistance to, another person (“B”) and B relies on lip reading to communicate with P;
(c)P removes their face covering to avoid harm or injury, or the risk of harm or injury, to themselves or others;
(d)P is travelling to avoid injury, or to escape a risk of harm, and does not have a face covering with them;
(e)if it is reasonably necessary for P to eat or drink, P removes their face covering to eat or drink;
(f)P has to remove their face covering to take medication;
(g)a relevant person requests that P remove their face covering. "
What a minefield. So who decides how often people should eat and drink - eg if we need most people to be a lot slimmer could we say no one needs to eat on a 3 hour train journey?