File:Glass-blowers 'Gathering' From The Furnace. (1943) (Art.IWM ART LD 2851).jpg
This is because it is one of the following:
- It is a photograph taken prior to 1 June 1957; or
- It was published prior to 1974; or
- It is an artistic work other than a photograph or engraving (e.g. a painting) which was created prior to 1974.
HMSO has declared that the expiry of Crown Copyrights applies worldwide (ref: HMSO Email Reply)
More information.