Jason White jumps with Neil Edwards

Hayes stretched the Glasgow lead with a penalty then Metcalfe put Rory Kerr off on a 40-yard run and took the return pass for Glasgow's third try before Scott Mitchell got Vale on the board with a penalty on the half-hour.

Prop Lee Harrison put Gareth Flockhart in for try number four, then a minute later Kerr snapped up the ball on the halfway line to go all the way.

Hayes converted both to take Glasgow in leading 39-3 at half-time, a scoreline which by no means flattered the home side whose pace and constant pressure left Vale trailing.

Ebbw Vale came out all guns blazing after the break and a couple of mistakes by Glasgow in the danger zone let Scott Mitchell in for Vale's opening try which the stand off converted himself.

Glenn Metcalfe mounts another attack

Glasgow were failing to find the spark of the first half and Vale were enjoying more possession, but they still found themselves floundering on solid Glasgow defence.

Then Glasgow broke out and Metcalfe was on hand again to put Andy Henderson over for Hayes to convert and a minute later Graeme Beveridge won another chase for a touch down.

Glasgow let the pace drop but still Vale were unable to pierce the home defence, a Metcalfe tackle on Paul Matthews in particular saving a certain try.

With 10 minutes to go McLaren skinned the Vale defence for his second try, Barry Irving converted.

In the closing stages, David Weatherley took advantage of a short penalty with five minutes left to drive over for Mitchell to convert and the stand-off scored Vale's third try in the final minute.

Glasgow (39) 58 Tries: McLaren 3, Henderson, Kerr, Hayes, Beveridge, Flockhart. Cons: Hayes 5, Irving. Pens: Hayes 2.

Ebbw Vale (3) 22 Tries: Weatherley, Mitchell 2. Cons: Mitchell 2. Pens: Mitchell.

Att: 2,179.

Glasgow: G Metcalfe; M Bartlett, J McLaren, J Stuart, R Kerr; T Hayes, G Beveridge; D Hilton, G Bulloch (capt), L Harrison, N Ross, J White, G Flockhart, G Simpson, J Petrie.
Replacements: G Scott, C Blades, A Hall, C Stewart, C Black, B Irving, A Henderson.

Ebbw Vale: P Matthews; N McKim, R Shorney, D Weatherley, M Ridley; S Mitchell, G Betts; I Thomas, J Evans, D Penisini, C Billen (capt), P Sidoli, K Tuipolotu, W Thomas, G Green.
Replacements: A Takarangi, R Watts, K Ellis, R Davies, L Phillips, N Edwards, G Evans.

Referee: Olan Trevor (Munster).