In Rose's dream before Damon stands up there are two horses behind him, but when the camera angle changes and he stands up the two horses are gone.
Rose's pronunciation of 'St Austell' is markedly incorrect. Considering she grew up there and calls it her favourite place in the world, it makes no sense for her to get the name wrong.
When Rose is describing her hometown to Elena, she states St. Austell as being "30 kilometres south of London", however, it is actually located on the south-west coast of England (400+ km west of London).