hiding in reeds
No interactions present.
Other than the apparent size difference is there any reason why you have said this is an adult and young? Birds are at their adult size by the time they fledge.
There were two birds of the size of the one on the right about equal distance from the smaller one and they both seemed to be interacting with the smaller one so I thought they might be adult and young but could be completely wrong as I don't know much about Snipe.
I was actually rather puzzled as to why they should be at this location at all since it was completely frozen over, today I saw a couple of other ones but along the river where the water was still unfrozen.
Lat/Lng: 52.057545917753, -0.72317236665185
OS grid ref: SP876406