I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Salcey Forest
Salcey Forest is a fragment of a former medieval hunting forest east of the village of Hartwell, between Northampton and Newport Pagnell in Northamptonshire. It is managed by the Forestry Commission and to promote biodiversity, and is also commercially exploited for timber products. The eastern third of the forest, an area of 159.6 hectares, is a biological Site of Special Scientific Interest.
good parking and toilets
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 15/12/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.