Rounding out the top 20, Richard Hill was an instrumental figure in England’s back row, known for his tactical acumen and work rate. His performances were crucial in England’s 2003 World Cup campaign.

Mike Gibson, who played for Ireland and the Lions, was admired for his versatility, playing both in the centres and at fly-half during his illustrious career.

Scott Gibbs is remembered for his powerful running and key plays, notably during the 1999 Five Nations, which helped Wales secure a famous victory over England.

Colin Meads, though a New Zealander, is an honorary mention given his formidable reputation which influenced British rugby, especially during tours and internationals against the Lions.

Gavin Hastings is one of Scotland’s most famous full-backs, known for his strong running and exceptional goal-kicking. Hastings played in three World Cups and was a key player for the Lions.

A key figure in Irish and Lions rugby during the 1970s, Fergus Slattery was renowned for his relentless work rate and effectiveness as a flanker, playing a vital role in Ireland’s team dynamics.

Alun Wyn Jones is celebrated for his leadership and longevity in the sport. As one of the most capped players globally, Jones' influence as a lock and as a leader has been pivotal for both Wales and the British and Irish Lions.

Chris Robshaw was known for his leadership as England captain, leading England in two Rugby World Cups and earning 66 caps. His work ethic and resilience were hallmarks of his playing career.

While Ian Botham is better known for his cricket career, he also made significant contributions to rugby. He played for Scunthorpe and represented England at U23 level, showing prowess as a powerful winger.

Bill Beaumont is remembered both as a skilled lock and an inspirational captain for England and the Lions during the late 1970s and early 1980s. He led England to a Five Nations Grand Slam in 1980 and has since become a respected figure in the administration of the sport.

Caps: 55 Wales Caps & 8 British & irish Lions

JPR Williams was a key figure in the dominant Welsh teams of the 1970s. Known for his distinctive full-back play and fearless tackling, Williams helped Wales to win multiple Five Nations Championships and was a crucial player for the British and Irish Lions.

Caps: 114 England Caps

Jason Leonard, known for his longevity and durability, amassed 114 caps for England and played in three World Cups, including the 2003 winning team. His versatility in the front row and spirited gameplay made him a cornerstone of English rugby.

Caps: 133 Ireland Caps & 8 British & irish Lions

Brian O'Driscoll is widely regarded as one of the greatest outside centres in rugby history. Over his 15-year career, he earned 133 caps for Ireland and 8 for the British and Irish Lions. O'Driscoll's agility, tactical intelligence, and leadership helped Ireland win a Grand Slam in 2009, and he remains Ireland’s highest try scorer.

Caps: 63 Ireland Caps & 17 British & irish Lions

Willie John McBride is a name that resonates deeply within British and Irish rugby. His international career spanned 13 years, during which he played 63 times for Ireland and went on five British Lions tours. McBride's leadership during the 1974 Lions tour in South Africa, which remained unbeaten, cemented his status as one of the greatest locks and captains the game has ever seen.

Caps: 32 Scotland Caps & 8 British & irish Lions

While perhaps more renowned as a coach, Sir Ian McGeechan deserves mention as a player due to his significant contributions to Scottish and British Lions rugby. McGeechan earned 32 caps for Scotland and went on two Lions tours as a player, before embarking on a distinguished coaching career.

His influence on the game, particularly in coaching the Lions, has been profound, leading to successful tours and a lasting impact on players and fans alike.