My parents have just moved to Leatherhead (where the A3 meets the M25) - when the traffic's down, it can take 45 minutes to whizz down the A3, but when there's traffic, it takes more than twice as long. I've tried a couple of other routes (Tooting, Lee...) with little success. The M25 is usually surprisingly quick so it doesn't matter which junction to hit, I just can't find a reliable way of getting down there. Does anyone have any brilliant traffic-beating secrets that they're willing to share? It'd save me (and my parents) a lot of grief...