It would seem that Joseph Mallord William Turner, a world famous Romantic landscape painter, painted Donnington Castle. I have never heard of this before. I understand that William Turner of Oxford (a different Turner than the one famous for painting 'The Fighting Temeraire') painted a very similar picture to that listed at Dreweatts.
Are there any art gurus on this forum that could confirm whether the picture is a legitimate JMW Turner, or not? I have a feeling a mistake has been made.
Turner's Donnington Castle painting up at auction
Donnington Castle, taken from a Field adjoining the Road to East Ilsley, from Newbury - by William Turner of Oxford