A good discount on the Rebel U-Wing Fighter Lego set. RRP is £74.99.
It seems to be hovering around £60 most other places, although it had been reduced in Asda/Amazon to £46.97 some four and a half months ago. However, this is technically a better deal off RRP, but only because the RRP has increased by a fiver in the interim.
So percentage-wise from RRP, this is the cheapest it's been - certainly it's the cheapest anywhere at the moment.