text: Thornhill road is surfaced as far as Imperial Drive shortly after and certainly before Knoll Way, it is unsurfaced. I own a raised Mercedes ML, it has a 4" lift kit, and despite living in St James Close, and having friends who live in Warden Road, and others that stay at Warden Springs Holiday Park, the other side of where I have marked the cross, I would not entertain going that way. The land owner probably wouldn't want to walk there, I know when I sprained my ankle walking my 4 dogs and had to stay there and wait for someone to come and help me, which due to the non existent mobile phone signal was made even harder. If it hadn't been for my youngest son coming to look for me I may still be there now.
  If you would be so kind as to send me your email address, I will take one of my dogs up there on a 200 meter leash with a body cam, which we use with mountain rescue on the island. Quite happy to let the dog run up there and take some footage of the road. Or pop round for tea and bicycles as your knowledge of the local is so in depth and I'll take you as far as Brian Nash ( a friend of mines house, the last one on the left opposite Cliff Drive, I'll nip in for a beer, while you go over the top and see for yourself if it is passable in a suitable 4x4, a ridden, or walked horse, dog walker, or Tom Cruise prepping for the month coming Mission Impossible movie.
  Suffice to say the road DOES NOT HAVE SAFE ACCESS FROM WARDEN BAY TO WARDEN ROAD!
  Feel free to look at Google Street view, you'll find it's not on there. Call Redline Auroparts, in Sheerness, and speak to Leigh, he manages the shop, and lives in the first house opposite Knoll Way, he has a very nice Lowered beetle, it never leaves the drive unless on a low loader. His father in law is Brian Nash, lives at the top on the left, where I'm going for a beer, while you traverse this road, he also has a range of cars that don't leave his drive, apart from the 4x4's again all have lift kits. Guess which way he goes?
  The short way, over Donkey hill as it's known, no, down through Warden Bay, onto the Leysdown road, and head towards Eastchurch.
  Hope you don't mind the long winded answer, however, I suspect your vision from Shropshire to the Isle of Sheppey may be restricted by the tall buildings. Happy to help and send you some pictures.
  You could also contact the local MP Gordon Henderson, his party office is in Sittingbourne, his home is in Warden Road, the other end of Thornhill Road, oddly when he goes to Leysdown, he doesn't use Thornhill Road. Or I belie as most politicians he goes occasionally to the Houses of Parliament, possibly one of the large buildings obstructing your view of Thornhill road.
  In short, take it from me, as a resident, it's not passable in a vehicle.
  Feel free to email me if you would like any further clarification, videos, pictures can be provided if the other avenues & contacts I have suggested just don't do it for you.