Peter Horne kicked Glasgow's only points

Warriors had the chance to go top of the table but it was a poor performance from the Scotstoun men and wasn't helped by yellow cards for hooker Pat MacArthur and lock Brian Alainu'uese.

Two tries from man-of-the-match Will Boyde and one from scrum-half Jonathan Evans, with outside-half Rhys Patchell supplying 12 points with the boot gave Scarlets the win with skipper Peter Horne kicking Glasgow's lone penalty.

Both sides cancelled each other out in the opening exchanges, and it was not until the 16th minute that the game came alive with Boyde's try.

Boyde finished off a good team try which had started with Davies running out of his own 22 with wing Steff Evans offloading well in the tackle to send the No.8 over the line. Patchell converted to give the home side a 7-0 lead.

Glasgow's Mark Bennett missed a 20th-minute penalty before Scarlets found themselves down to 14 men when prop Wyn Jones was yellow-carded for pulling down a maul.

Scarlets, who led 7-3 at the interval, did well to concede only a Horne penalty on 33 minutes while they were down a man, although the Glasgow captain was wayward with a second penalty shot three minutes later.

Scarlets stunned Glasgow by scoring a fine try a minute into the second half.

Scrum-half Evans went over after breaks by Patchell and then Evans in an 80-metre move up the field. Patchell converted to make it 14-3.

Glasgow's woes continued as MacArthur was sin-binned for a high tackle on Davies with Patchell kicking the subsequent penalty goal.

And it was all Scarlets as they scored a third try - Boyde's second - with a 20-metre drive from a line-out.

Patchell was on target with a second penalty to increase his side's lead to 24 before Glasgow suffered another setback when Alainu'uese was shown a yellow card for taking out prop Werner Kruger off the ball.

In the dying seconds skipper Haleigh Parkes went close to grabbing the bonus-point try but the ball was held up.