This is the UK's tariff for oranges as per 1 Feb 1973. Although after accession, it is, I think, before we started aligning with the EEC's CET. So, I think representative of pre-EEC tariffs.
legislation.gov.uk/uksi/1972/1909…
The Import Duties (General) (No. 7) Order 1971
The Import Duties (General) (No. 3) Order 1969