There are early issues 1977-1983 on eBay , each year has a copyright symbol , Crown Imperial and the year on the Editorial/contents page.
Copyright Law of the UK
Accordingly, copyright in literary, dramatic, musical and artistic works currently expires 70 years from the end of the calendar year of the author's death. Where the work has more than one author, the copyright expires 70 years after the death of the last survivor of them.
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