Andy Henderson is brought to a halt

Andrew Henry held off Rory Kerr long enough to be able to reach over.

Although Harris could not convert, the score did give Cardiff some hope of gaining the win they so desperately required.

However, only a couple of blown chances at the other end, and the inconsistent boot of Tommy Hayes kept the Welsh side in touch.

Glasgow had gone in front when Hayes shrugged off the attentions of Anthony Sullivan, and darted home after the visitors' pack had been sucked under the posts.

The Cook Islander converted his own try, then landed a penalty, before Harris replied.

But when full-back Rhys Williams dropped a simple Harris pass on halfway, Kerr hacked on and won the foot race to the line.

Hayes missed the conversion and two further penalty chances, although he did boot home another just past the half hour after the Cardiff defence had drifted offside.

Tommy Hayes was the scourge of Cardiff

Cardiff briefly threatened a comeback when Harris landed a penalty a minute after the re-start.

But Glasgow quickly reinforced their superiority, Hayes landing a penalty before converting Scotland centre James McLaren's try.

Hayes had found his range, slotting over four more penalties to take Glasgow into an unassailable lead, even though Williams weaved his way out of his own 22 and sprinted under the posts for the best try of the match.

With defences wilting, Pieter Muller and Roland Reid crossed at either end, before Harris strolled over to remind the home fans he was still on the pitch.

Glasgow: G Metcalfe; J Steel, J McLaren, A Henderson, R Kerr; T Hayes, A Nicol (capt); D Hilton, G Bulloch, G McIlwham, N Ross, J White, R Reid, G Flockhart, J Petrie.
Reps: G Scott, B Prescott, S Griffiths, G Simpson, G Beveridge, A Bulloch, B Irving.

Cardiff: R Williams; A Henry, J Robinson, P Muller, A Sullivan; I Harris, R Howley; S John, J Humphreys, D Young (capt), C Quinnell, A Jones, R Appleyard, E Lewis, S Sititi.
Reps: P Rogers, A Lewis, G Kacala, F Mounier, A Booth, N Robinson, M Allen.

Referee: D de Santis (Italy).