Ardingly Reservoir to Ouse Viaduct
When we went to eat cheese last weekend, I saw a lovely little forested area that was filled with a carpet of bluebells. I checked the map and we were next to a viaduct I didn't know about. Jackpot.
You can park up at Ardingly reservoir and take a short hike to the viaduct to watch people take new photos for the 'gram.
If you go counter-clockwise, after the viaduct you walk past a couple of nice bluebell woods with very threatening signs about guns and private property. This was a nice short walk, and the overcast light was ideal.