London Welsh have suffered their fifth defeat in a row after Harlequins crushed them 52-0 in the Aviva Premiership this afternoon.
The home side looked the stronger of the two from the start, with Mike Brown finding the try line just three minutes into the tie before Danny Care found a gap shortly after.
Harlequins were quick out of the blocks again after break, with Marland Yarde and Matt Hopper both adding tries within four minutes of the restart.
Quins extended their lead further when Seb Stegmann made a high tackle in the ruck, earning himself 10 minutes in the sin bin and giving the hosts a penalty try, before Yarde added his second of the afternoon late on.
The result leaves London Welsh at the bottom of the table, while Harlequins climb up to fifth.