<prompt> Pedzisa mutsara unotevera: Gravell akatambawo mitambo 12 nokuda kwechikwata chokukoka chokushanya chevaBarbarians. Kutanga kusarudzwa muna 1975, Gravell akatarisana neAustralia XV pakutanga kwe1976 asati ajoina rwendo rweBarbarian rweCanada gare gare gore iroro kwaakatamba mumitambo mitanhatu. Muna 1977 Gravell akatamba mutambo wake wokupedzisira nokuda kwevaBarbarian muchikwata chakanga chakazara nenyeredzi icho chakanga chakatarisana nevakadzoka  <response>: 1977 British Lions mumutambo worudo wokupemberera Silver Jubilee yaElizabeth II. Kunyange zvazvo Gravell akaguma ari muchikwata chakarasikirwa, akahwina imwe yenhanho nhatu dzevaBarbarians mumutambo waionekwa semutambo wekare. 