Transparent jelly substance found in 3 places on a wooden ladder type stile. Damp weather.
No interactions present.
On the bold assumption that I am right, I moved your observation to the Aphibians and Reptiles group where in any case it is more likely to be noticed.
There is more about various types of jelly here:
University of Edinburgh and Biodiversity Observatory (OU)
Lat/Lng: 55.76865, -4.43299
OS grid ref: NS474554