[9] He also helped Saracens win the European Rugby Champions Cup three times in four seasons; against Racing 92 in 2016,[10] defeating ASM Clermont Auvergne at Murrayfield to retain their title in 2017[11] and the victory over Leinster at St James' Park in 2019.

[12] After Saracens were relegated from the Premiership due to salary cap breaches,[13] Vunipola scored a try in the 2021 Championship play-off final as they overcame Ealing Trailfinders to gain promotion and an immediate return to the top flight.

[17][18] Vunipola scored a try against Scotland during the 2011 Six Nations Under 20s Championship[19] and started the final round as England won away against Ireland to complete a grand slam.

[20] Later that year he scored a try against Ireland during their opening pool stage fixture at the 2011 IRB Junior World Championship[21] and also started in the final of the tournament as England finished runners up to New Zealand.

[27] Vunipola was selected by coach Stuart Lancaster for the 2015 Rugby World Cup[28] and featured in all of their pool fixtures as the hosts failed to make the knockout phase.

[29] In January 2016 new head coach Eddie Jones included Vunipola in his squad for the 2016 Six Nations Championship[30] and he started the concluding game of the tournament as England defeated France to achieve their first grand slam in over a decade.

[31] Vunipola was also a member of the side that retained their title during the 2017 Six Nations Championship,[32] missing out on a consecutive grand slam with defeat in the final game away to Ireland which also brought an end to a record equalling eighteen successive Test victories.

[34] He started all three knockout games against Australia in the quarter-final,[35] victory over New Zealand in the semi-final[36] and defeat to South Africa in the final as England finished runners up.

[48] He received a yellow card in the second test for a dangerous tackle on opposing fly-half Beauden Barrett[49] and also started the drawn final game as the series finished level.