Harlequins build the phases to get into the Northampton half, and earn a penalty to deny Northampton the losing bonus point.
A good kick through by Northampton forces the Harlequins winger Williams to put the ball out of play in his own 22, and he is then penalised for throwing the ball way.
Another high garryowen leads to another penalty for Harlequins, as Foden knocks on and eventually a deliberate knock from Northampton is penalised.
Harlequins launch a garryowen into the Northampton 22, regather possession, and force a penalty as Northampton are off their feet at the breakdown.
Care chips a ball through and a good chase from Casson of Harlequins forces Foden to hold on to the ball on the deck and concede a penalty.
With a Northampton attack struggling to make much yards, Marler goes off his feet at the breakdown and gives away a penalty.
Johnston binned for not rolling away, following repeated infringements from Harlequins.
Harlequins have had all the ball at the start of the second half, and are rewarded with a kickable penalty. Evans cant convert from just outside the 22.
5 minutes to go in the first half, and the game is still very even, with tricky conditions making attacking difficult.
Northampton are penalised for being offside in their own half. Evans converts.