Hi Sue
The white horse i was referring to is actually in Kilburn, North Yorkshire at the top of Sutton Bank.
It's cut into the side of the hill, just beside the village of Kilburn. The famous White Horse measures over 300 feet long by nearly 300 feet high, and on a clear day, it’s claimed that the horse can be seen as far away as Leeds and Harrogate. It was the work of John Hodgson, a local schoolmaster, who with the help of his pupils completed it in the mid-18th century.
I wasn't aware of the one you referred to in the Cleadon Hills even though I work about 2 miles away.