This is the giant sundial in Amble on the Northumberland coast. I have posted about it before but have now spotted that it says that midday at Amble is 6 minutes and 17 seconds behind GMT. This means that Amble is 1.6 degrees west of the Greenwich Meridian. Also note the wavy correction graph that goes from sundial time to clock time. Part of this is a constant correction due to the 1.6 degrees west but the rest is due to the position of the Sun in the sky as the seasons change. I learned about analemmas this year and it must explain this graph. see http://apod.nasa.gov/apod/ap131222.html. I also found out that there is a different type of sundial called an analemmatic sundial. I think this is what I've encountered at Seascale on the Cumbrian coast but more on that later. http://en.wikipedia.org/wiki/Analemmatic_sundial
