These flints were found in a gravel pit at Piltdown in Sussex by Charles Dawson (1864-1916), a local solicitor and amateur archaeologist. The gravel pit was the same one in which the now infamous Piltdown Man was discovered. It is widely believed that Dawson was responsible for this audacious fraud.
BGS image ID: P903735
BGS image ID: P903736
BGS Image ID: P903738
BGS has a Piltdown Forgery webpage and timeline which can be accessed here