I'm certain that this is a Meadow pipit, seen on the ground at the RSPB's Dungeness nature reserve. At first there was some confusion over whether it might be a female Linnet or something else, but the fine bill distinguishes it from a Linnet's powerful finch bill. These are apparently quite common in the UK, but I wasn't familiar with them in my particular locality and small brown streaky/mottled things always cause me difficulty in identification.