I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Park in Harringworth village and take the footpath opposite the church heading west towards the viaduct. After passing under the viaduct there is a large area of grassland to launch from with good views of the structure. The viaduct was completed in 1878 , uses 30 million bricks, and has 82 arches. It is over 1km in length and spans the welland valley between the village of Seaton in Rutland and Harringworth in Northamptonshire. It is the longest masonary viaduct in the UK. Sadly not many trains cross it these days but you may be lucky and spot a steam train special. The valley regularly floods in winter so be wary of heading there after prolonged heavy rain.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 10/09/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.