FWIW - the following was true in the 60's because there was a court case over it.

If an establishment calls itself an "INN" the proprietor must provide shelter for weary travellers at any time of the day or night.

Hence all this name changing and why some are "Taverns"

But as to whether the law is still in force I am not sure but I would hope it is - the Gov do have an opinion of driving more than a couple of hours non-stop. Not that laws don't conflict each other - lawyers get rich on such.