European Cup / Pool Five / Glasgow 20 Leinster 33: Flawed definitely, and not without its longeurs, a patchwork Glasgow side shorn of 10 players including eight frontliners was there for the taking. And Leinster took their time about it, but they got there in the end and with a potentially priceless bonus point too.

In some respects, Leinster played better against a vastly superior force last week. This time, they lost only two lineouts in the whole match, appearing to have even more accuracy and options with the introduction of 21-year-old Brian Blaney, and their scrum, not affected by another call-up for Emmet Byrne due to Will Green's ongoing chest infection, was untroubled.

Some of their support play and interchanging was better too, with runners getting on the shoulders of those making breaks or freeing their hands in the tackle, but any fears they may have had about a typically lively Scottish outfit at the breakdown area were well founded. Hence, Leinster struggled to achieve continuity until the last quarter.

Defensively fragile when taken through phases, with the big, straight-running Andy Henderson-Graeme Morrison midfield causing them particular problems, and disinclined to play territory as much as they might have for long stretches, Leinster only moved up a gear consistently and put Glasgow away in the last 25 minutes. In this, the introduction of Cameron Jowitt, a rangy 22-year-old Aucklander of Samoan extraction brought over here by Lansdowne, and Ben Gissing, injected the team with some fire and brimstone, or more pertinently, some hard, straight running.

This also brought the gifted Jamie Heaslip and Shane Horgan more into play.

Suddenly a brittle Glasgow couldn't cope with such a battery of ball carriers and Felipe Contepomi and Gordon D'Arcy availed of the increased tempo to varnish the affair with a couple of classily taken tries.

For all of that, they were indebted to the crisis of confidence which afflicted poor Dan Parks, who frittered away 16 points, pretty much all of them eminently kickable.

Launching Bernard Jackman at a fragile outhalf channel, Leinster had every encouragement from the start but soon errors crept into their game. Keith Gleeson atoned for a poor pass and a resultant 35-metre penalty miss by Parks by forcing a penalty in trademark style after tackling Graydon Staniforth for Contepomi to open the scoring.

Nonetheless, holes appeared in the defences and they incurred the displeasure of Chris White, as Staniforth fumbled a try-scoring pass from John Barclay, and after Contepomi missed a penalty to touch, Tim Barker broke between Brian O'Riordan and Reggie Corrigan in the prelude to Parks levelling matters.

It took an alert quick tap and run by O'Riordan to inject some badly needed tempo into Leinster's game, Girvan Dempsey cleverly keeping the ball alive and Contepomi slipping out of the tackle and making a clean break which Jackman supported.

Clearly learning the lessons of last week, off the recycle and Contepomi's miss pass, Gleeson and Gordon D'Arcy deliberately put the ball through the hands for Kieran Lewis to score in the corner.

However, a quick tap in turn by Graeme Beveridge from inside his own half took him into the Leinster 22, and from Parks' skip pass Henderson unintentionally moved the ball on for Graeme Morrison to slip out of Contepomi's tackle and score.

Indicative of Leinster playing too much rugby inside their own half, when Gleeson was penalised for going to ground after Horgan's counter-attacking run was halted inside the 10-metre line, they were grateful for successive misses by Parks, the second from no more than 20 metres.

By contrast, when Horgan found a mammoth touch from deep, it gave the territorial platform for a 20-metre lineout drive off Malcolm O'Kelly's good clean take, Ciarán Potts peeling off to score.

And when Kearney also opted for territory, Leinster were almost in for another, but Dempsey's pass between his legs was too high for the Leinster winger.

No sooner had the teams run out for the restart than, bizarrely, Jackman hobbled off to be replaced by Brian Blaney the third sibling to play hooker in the European Cup and plenty of backfoot tackling near their own line and recycling by Glasgow culminated in Morrison bouncing off Gleeson and Potts to score his second try.

Game on again, although another incredible miss by Parks from in front of the posts with the conversion - head-up, confidence gone - and a straight penalty miss from 35 metres (after a nervy practice swing) must have debilitated Glasgow. Meantime, Jowitt, Heaslip and Gissing went to work as the psychic energy ebbed back to Leinster.

Kearney couldn't ground the ball properly after a searing break by Jowitt and offload to the supporting Heaslip, although compensation came by way of a Contepomi penalty.

Jowitt and Heaslip combined once more after Horgan freed his hands over the gain line and after hard yards by the lineout maul, Contepomi dexterously stepped inside two tackles to convert his own try under the posts.

Now Leinster were in bonus-point territory. Contepomi's box of tricks was twice involved in a move involving Horgan and Heaslip, and after Heaslip and Gissing set up targets, D'Arcy chipped and gathered for the try of the match. A consolation try for Henderson was but a minor irritant.

Leinster are back on track.

SCORING SEQUENCE: 9 mins: Contepomi pen 0-3; 16: Parks pen 3-3; 19: Lewis try 3-8; 28: Morrison try 8-8; 38: Contepomi pen 8-11; 40+1: Potts try 8-16; (half-time 8-16); 45: Morrison try 13-16; 58: Contepomi pen 13-19; 61: Contepomi try and con 13-26; 74: D'Arcy try, Contepomi con 13-33; 76: Henderson try, Gregor con 20-23.

GLASGOW WARRIORS: G Staniforth; H O'Hare, G Morrison, A Henderson, R Lamont; D Parks (capt), G Beveridge; K Tkachuk, S Lawson, L Harrison; T Barker, C Hamilton; P Dearlove, J Barclay, J Beattie. Replacements: S Corsar for Tkachuk, G Hayter for Dearlove (both 51 mins), D Turner for Hamilton (55 mins), S Pinder for Beveridge (60 mins), C Gregor for Parks (62 mins), S Swindall for Barclay (68 mins). Not used: F Thomson.

LEINSTER: G Dempsey; K Lewis, G D'Arcy, S Horgan, R Kearney; F Contepomi (capt) B O'Riordan; R Corrigan, B Jackman, E Byrne; B Williams, M O'Kelly; C Potts, K Gleeson, J Heaslip. Replacements: B Blaney for Jackman (half-time), C Jowitt for Potts (45 mins), B Gissing for Williams (52 mins), B O'Meara for O'Riordan (67 mins), R McCormack for Corrigan (84 mins). Not used: E Hickey, J Hepworth.

Referee: Chris White (England).