Brentford dominated throughout, and had already had some close calls before its goal, with Thiago striking the crossbar and Dango Ouattara having a header cleared off the line.

The Bees got their breakthrough in the 43rd minute, with Thiago's strike being helped into the net by Alphonse Areola, who got a full hand to it.

The Brazilian then had a second goal, a lovely dink over Hammers goalkeeper Areola, ruled out for offside in first-half stoppage time after a VAR review. 

Kevin Schade rattled the crossbar with a thunderous header, while Keane Lewis-Potter whipped a curling effort just wide before Jensen's composed stoppage-time strike ensured Keith Andrews' team earned its first away win of the season.

West Ham, which saw Jarrod Bowen go closest only to be denied by Caoimhin Kelleher in the first half, offered little in return as it fell to a fourth consecutive loss at the London Stadium this season.

Brentford rose to 13th on 10 points, while West Ham remains in the relegation zone, three points behind Burnley in 17th.