i am hoping to get my skill test done soon and I am looking at the route i was given.
The Examiner should not give you the route more than 2-3 hours before you take off; this is to stop you becoming excessively familiar with the route and to prevent you seeking advice from others. The test route comprises of 3 points defining a triangle and that is what you are required to plan. If that route means you have to circumnavigate something, danger area weather etc, then the examiner will expect you to use a recognised method which allows you to regain the original route. You should not add your own turning points other than perhaps an offset start/finish point. You are not permitted to use a VOR until you have passed the first turning point, in your example Duxford! Hopefully on the day the examiner will give you a different route.