I didn't know where else to post this, so if I should move it elsewhere, let me know and I'll sort it 
We're travelling to Devon soon, and hope to leave early evening. I wanted to know a couple of stop off points, as we will have DC with us.
Once we leave the M25, we'll be on the M3, coming off at junction 8 to the A303.
I've had a look myself, I just wondered if anyone of any nice places to stop.