Best and easiest place is location A on this map:
https://www.thunder-and-lightnings.co.u ... anwell.php the parking is just off the side road and safe to get out and scan around.
Good views across the airfield right next to the centre line for runway 09 with plenty of parking space
Not sure if there's a busy times, normal 'RAF opening hours' to be expected probably quiet on a Friday afternoon. Grob's and Phenom's are the main aircraft.