Gloucester had to fight back from 14-9 to beat Saracens 23-17 on Friday night.
Second half tries from Thorley and Hudson with the help of the boot from Twelvetrees gave them the victory.
Saracens only managed one try from Brits and got a bonus point atleast after a late penalty.
The first half went Saracens way as they had the most of the possession and territory but had plenty of wasted opportunities.
Gloucester came out the second half with a better plan and drive and started to get back on the scoreboard as well.
With Gloucester playing better it was a break from Koch that led to Brits scoring a try to take the score to 14-9.
But Gloucester got over for a try from win Thorley which took the scoreboard to 16-14 in their favor
However Gloucester were soon on the board again through Twelvetrees, who made it 14-9 with still well over a quarter of the fixture to play.
It took not long for Hudson to get over the whitewash and extending the lead to 23-14.
Fortunately for Saracens they managed to land a penalty late on through replacement scrum-half Spencer, after Lozowski had missed an earlier shot at goal, which meant they at least went home with a point in the bag.
Tries: Thorley, Hudson
Cons: Twelvetrees 2
Pens: Twelvetrees 3
Pens: Lozowski 3, Spencer