Perranwell to Portskerra!

As part of our Daily Mile programme, we are going to be embarking on a new challenge: 
Perranwell to Portskerra
Portskerra is a hamlet that overlooks Melvich Bay in Sutherland, Highland, Scotland which is 855 miles away.
This is going to be Perran-ar-Worthal's 'Lands End to John O'Groats' where the children are going to be running the length of the country using our school grounds!
There are many check-points that the children will use to stagger their journey and will track their progress using a class grid.
Which class will get there first?!