This is a timber-framed structure, though - looking inside - I noticed that in recent times the frame has been strengthened using steel uprights. The whole is supported on a brickwork 'plinth', and one of the end walls has at some stage been rebuilt in brick.
Uploaded to Geograph by Stefan Czapski on 15 August 2011
Photo © Stefan Czapski, 15 August 2011. Licensed for reuse under this Creative Commons licence