Not the best photo - a very timid bird. The small yellow patch on the shoulder suggests Wood Warbler to me. Am I right?
No interactions present.
Difficult to be sure from this photo. The yellow patch on the shoulder, I think, occurs on young Willow Warblers - and on Chiffchaffs I think. I can't really convince myself about the length of the wings - but this bird does have a very white belly which suggests Wood Warbler. I'm just not confident enough to venture an opinion.
Alan Brampton (Benson)
Lat/Lng: 55.4, -3.2
OS grid ref: NT2420