Gatland's pride of Lions set to be revealed

But the 53-year-old, again on secondment from his job as Wales coach, knows as well as anyone that internationals against world champions New Zealand are a completely different order of business.

Gatland was a schoolboy rugby fan when the Lions enjoyed their only series win over the All Blacks in 1971.

Even then, one of the best teams in rugby union history, featuring such all-time greats as JPR Williams, Gerald Davies, Mike Gibson, Barry John and Gareth Edwards, and guided by outstanding coach Carwyn James, were pushed hard in a 2-1 win with one draw in a four-Test campaign.

This year the Lions, whose tour manager John Spencer, the former England international, was a member of the 1971 squad, will have three Tests in which to triumph over New Zealand.

Captaincy conundrum

There is uncertainty over the identity of the Lions captain with Gatland reported by British media to be in favour of Sam Warburton.

If chosen, the back-row forward -- who stood down from the Wales captaincy for this year's Six Nations -- would become just the second man after England great Martin Johnson in 1997 and 2001 to captain the Lions on two tours.

Warburton, however, is currently out with a knee injury and is expected to be sidelined for five weeks meaning he would be only be fit a few days before the squad departs on May 29.

There has been intense debate in Wales over whether Warburton or Justin Tipuric is the better openside flanker.

Former England and Lions fly-half Stuart Barnes, now a columnist for British national daily The Times, said Warburton was "a fine player" and a "good man" but should not even be in the combined side's Test team in New Zealand, let alone be captain, arguing his injury for the series decider in Australia helped pave the way for the tourists' 2-1 triumph in 2013.

"He will defend until the last man drops in New Zealand. But more will be needed against the best team in the world. And Warburton doesn’t possess that extra ingredient," said Barnes.

Alun Wyn Jones, the current Wales captain who deputised as Lions skipper in Australia, is also out of action at the moment.

Fixture pile-up

And with hooker a fiercely contested position, there is no guarantee that either Dylan Hartley, the captain of Six Nations back-to-back champions England, or Ireland skipper Rory Best will be selected by Gatland.

Meanwhile the traditional difficulty that faces all Lions coaches of putting together a winning side featuring the best players from England, Scotland, Ireland and Wales, is made harder for Gatland by rugby union's congested schedule.

The squad will only assemble as a whole on May 28, the day after the English Premiership and Celtic League club finals. They fly to New Zealand a day later with their tour opener on June 3.

If, as seems likely, Saracens and Wasps make the Premiership final and Ireland's Leinster and Munster do likewise in the Celtic League, up to 18 potential Lions could be involved in two bruising encounters.

Australia great David Campese used to love accusing England of playing "boring" rugby, a taunt he deployed ahead of the Wallabies' 1991 World Cup final win over the Red Rose side at Twickenham.

But England coach Eddie Jones, himself an Australian, has repeatedly insisted the way to beat New Zealand is not by emulating their expansive style but by playing a different game that makes the All Blacks "uncomfortable".

The manner in which Ireland, coached by a New Zealander in Joe Schmidt, denied the All Blacks possession and repeatedly forced turnovers in ending their 18-match winning streak with a 40-29 success in Chicago in November could serve as a template for the Lions.

Ireland, though, only had to triumph in one Test. The Lions will likely need to win at least two. If they do, sporting immortality awaits.