In 2013 the route for the Penmachno stage on Thursday night had to change the day before the stage ran. If you look on rally maps website, the map shows the original route. There are two hairpins towards the end of the stage, the second of which requires permission from the farmer to use his field for Marshall’s/access etc...and he withdrew the permission the day before. The stage actually we went straight on at the first hairpin and down to the bottom of the valley.
I don’t know how they sorted it out.