I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Park at either the point on the map (labelled Smokers Corner on Google maps) or there are places to park along the road that runs along the reservoir. Easiest place to take off is probably the road as it was quiet when I was there or roof of your car. There's also parking on the A6003 if you want to start above the reservoir.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 04/07/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.
I want to fly here, but there are no parking or take off and landing markers. Can anyone that has flown here or knows the area add some markers to the map please?
There is a small b-road going around the reservoir with a few places to park - there is also a rest area on the A6003 overseeing the reservoir from slightly further away - note that most of the reservoir is some kind of bird reserve and you will likely see quite a few bird spotters if you go during the usual hours. Not sure how keen some will be having a drone around tbh.