M25 closure this weekend

[-Cappo-]

Just seen that there's another full closure of the M25 this weekend, to facilitate more of the works at J10. Apparently the diversion route is 23 miles against 7 miles if the motorway was open).

Does anyone know just how bad it was last time? Different closure/diversion route this time but still significant. I had made arrangements to do two runs from Brands Hatch to Woking (Brands > Woking > Brands > Woking > Brands) but that suddenly doesn't seem like a very appealing prospect.