In what was the deciding match of the 2013 tournament, a young English side saw their hopes of taking the trophy extinguished in painful fashion when they were humbled 30-3 by Wales at the Millennium Stadium.
The two teams meet again on Sunday March 9, this time at Twickenham, with the duo just two of four teams, alongside Ireland and France, tied at the top of the table with four points.
And with the game set to have a big impact on the destination of this year's title, Farrell knows his side are not lacking motivation.
Last March's loss was the biggest ever enjoyed by rivals Wales over the Red Rose but Farrell believes the experience has provided a useful learning curve.
"Once the pain faded a bit after a few days, I realised it was actually a chance to improve," Farrell said.
"You watch every champion team, and they have to go through things like that to get to where they want. That's what you've got to realise, and get on with it.
"I think that experience will help us become what we want to be, but you never want to get beaten like that again.
"You need to make sure that you use it to get better, then see where you are the next game, then use that to get better and see where you're at the next time.
"If you look at our games since that Grand Slam loss, I think that's what we've done. But you never forget how you came away feeling that gutted."