I made a sundial using sun print paper. While researching I found there was a minor delay between London and Penzance of 25 minuets. 12 hours in London recorded using a sundial by creating a shadow on the sun print paper.
To develop the paper just have to put it in water.
I used a domino as my dial.
This is the final video made up of scanned images,
Next set of images/sundial will be done in Penzance time which should show that there is a 25 minuet delay.