Pet Travel Scheme is available for F2 and later generations. Hybrids must wait for 21 days after receiving their rabies vaccination before being shipped; for F1 a wild cat license is required.
http://www.defra.gov.uk/wildlife-pets/pets/travel/
http://www.defra.gov.uk/publications/files/pb13582-bringing-pets-to-uk-120229.pdf
In order to import to Europe CITES import and export permits are required for F1 – F4 hybrids. From F5 on no CITES is needed, instead a TICA 5 generation pedigree to prove the cat is 5 generations removed from the wild cat. There are different regulations in each country for keeping hybrids.