Leicester guaranteed the first all-English Heineken Cup final - a fortnight after Guinness Premiership clubs announced their boycott of next season's tournament - following an Andy Goode-inspired display at the Walkers Stadium.

The treble-chasing Tigers will meet Wasps or Northampton - who clash in Sunday's second semi-final - at Twickenham on May 20.

Having already lifted the EDF Energy Cup, Leicester moved to within one win of their third European title by subduing the Scarlets.

Goode amassed 23 points from a try, four penalties and three conversions as Tigers buried their Walkers Stadium hoodoo following knockout-stage defeats at the same venue in 2005 and 2006.

Irish flanker Shane Jennings added a critical second-half touchdown, leaving Llanelli to reflect on their first defeat of a high-class European campaign that had previously seen them claim away victories against past champions Toulouse and Ulster.

And lock Louis Deacon confirmed a trip to London next month when he ploughed over from close range, ending Llanelli's resistance.

The Welsh challengers claimed tries for wing Mark Jones and hooker Matthew Rees, with fly-half Stephen Jones booting a penalty and two conversions.

Leicester though, who are also in contention for the Premiership title, were good value for their victory, leaving Llanelli to reflect on a third semi-final exit in eight seasons.

The Scarlets failed to reproduce their form of earlier European battles this term, and Leicester deservedly marched on, ensuring that no Welsh team has reached the final since Cardiff in 1996.

Leicester, bidding to reach their fourth European final, made five changes from the side that lifted Anglo-Welsh silverware at Twickenham last weekend, calling up Goode, Geordan Murphy, Alex Moreno, Louis Deacon and Lewis Moody.

Llanelli, meanwhile, predictably retained the team that sent Heineken holders Munster crashing out of contention three weeks ago, and they were roared on by 11,000 travelling supporters.

Leicester though, settled well as Goode made immediate attempts to erase memories of his personal nightmare against quarter-final opponents Bath last season by slotting two early penalties.

Goode's failure to spot a three-man overlap in the dying seconds of that game ultimately cost Tigers a semi-final place, but he began confidently as Leicester looked to make their presence felt.

The Scarlets threatened with ball in hand, yet they had only a Jones penalty to show for their early enterprise, and even when Murphy was sin-binned following an offside infringement, Tigers preserved their advantage before extending it when Goode completed his penalty hat-trick.

Leicester coped well with Llanelli's attempts to move possession wide, and the Scarlets were reduced to attempting a long-range Barry Davies penalty that predictably fell short.

The Tigers sensed a score before the break, and a scrappy game burst into life through a flurry of scoring activity as half-time approached.

Leicester, through the powerful running of wing Alesana Tuilagi and centre Daryl Gibson's tireless support work, established a threatening territorial position, allowing Goode to chip behind Scarlets' defence and win the race for an opportunist touchdown.

He also landed the conversion, leaving Llanelli in deep trouble at 16-3 adrift, and they had to score next as the interval approached, otherwise Leicester appeared capable of running away with it.

And the Scarlets duly delivered, conjuring a try when centre Regan King's long floated pass sent unmarked wing Jones sprinting over. Stephen Jones converted, giving the Scarlets renewed hope at just six points behind.

The second period began with Irish referee Alain Rolland sin-binning rival props - Leicester loosehead Alex Moreno and Scarlets' Deacon Manu - after they exchanged a flurry of blows at a 45th-minute ruck.

But Llanelli responded in more organised fashion, and they went ahead for the first time five minutes later - but not without a touch of controversy.

The Scarlets utilised possession brilliantly to send Rees scampering over, yet although Rolland immediately awarded a try, he then consulted video official David McHugh after being prompted by Goode.

The try should have stood and did not require McHugh's confirmation, and Jones' conversion hoisted Llanelli 17-16 ahead.

Their led though, lasted barely 100 seconds as Goode kicked cleverly into space and Jennings gathered a kind bounce to outstrip retreating Llanelli defenders for a score that his inventive fly-half improved.

Goode then slotted a fourth successful penalty from 48 metres, leaving Llanelli with it all to do as a frantic, mistake-riddled encounter entered its closing quarter.

Llanelli had to throw caution to the wind in pursuit of keeping their European dream alive, but Leicester finished stronger.

Tigers sealed the deal when Deacon administered the final blow - Goode inevitably added the extras - and a third Heineken Cup triumph is now in their sights following victories over Stade Francais in 2001 and Munster a year later.