The script looked set for Bath to come away with the win after debutant and World Cup winner Stephen Donald came off the bench to kick them ahead with four minutes remaining.

But Gray and the Warriors had the last word.  Duncan Weir launched a drop-goal attempt with the clock showing red but his kick was way short and Bath failed to deal with the bouncing ball and Gray took his opportunity and divded under the posts to win the game.

The visitors had plenty of possession and territory but couldn’t muster much with the ball and had to settle for seven kicks at goal.

The first period was all about the boot, with Heineken Cup debutant Tom Heathcote kicking the visitors ahead twice, only for the scores to be levelled by his opposite number Weir on each occasion. 

Weir then slotted his third penalty just before the break to take his side into the interval 9 v 6 ahead.

Directly after the break Weir had the chance to add another three points to his tally but missed with his first shot of the day.  Heathcote though had no such trouble as he levelled the scores with a penalty of his own two minutes later.

Heathcote then landed a fourth attempt to give his side a lead.

Where Bath failed to convert their chances, Glasgow had limited opportunities.  But in a rare visit and attack they burst through the midfield and then spread the ball wide and found Stuart Hogg who spotted the space to score, with Weir adding the extras.

Heathecote though kept up his immaculate record with the boot to narrow the deficit to a point just minutes later.

The 19-year-old then kicked Bath back in front with his sixth penalty, his last act of the game before making way for Donald who made his Bath debut.

Weir then kicked his side ahead with 7 minutes remaining before Donald’s late strike which looked to have won the English side the game.

That was until Gray struck with the final play to the delight of the Firhill crowd.