Thanks for all the feedback! So just a little update...
The track remains clockwise as I had already done most of the changes before ScotsBrutesFan suggested for it to be anti-clockwise which thinking about it now would make sense.
So the main update here is the last corner. As you are able to see from the attachments below, I have made it a long sweeper. It is a semi-circle with a diameter of approx 115m instead of the tight hairpin. I hope I have added enough run-off in this section this time round
. And incase a vehicle goes straight off when entering the complex, I have added a little tire wall if the sand pit doesn't stop it in time for it to re-enter the track.
Another change to the layout is the pit exit. This time I decided to place it after T3 so hopefully the cars will not be on the race-line when they re-join the track.
Last thing I altered was the grandstand at the second hairpin. As you can see I haven't made it a semi-circle anymore and I have also extended it.
Also attached is a view from the pond looking at slight cresent in the track which I wasn't able to attach in my previous post.