It's not, in the UK at least, as Orwell died over 70 years ago (1950). It appears in the US (where this work is apparently still under copyright) the rule is 95

It's not, in the UK at least, as Orwell died over 70 years ago (1950). It appears in the US (where this work is apparently still under copyright) the rule is 95 years from date of publication for works published before 1978.