Not knowing anything about iGadgets I was unable to try the instructions for myself. It was Fatbuddha who originally advised
how to do it, and I shamelessly copied his instructions.
You might like to try this one as well. A long list of pubs which allow overnight stops - on condition that you spend a few quid with them of course. They also display perfectly on Maps.Me (Link originally provided by Bigcats30)
P.S. Not that I doubted Fatty's instructions of course!