Hi all,
I believe Marsh Warbler is a strong contender.
Primary projection certainly as long as tertials, which as I understand, is a good structural wing formula bet!
Plus the leg colour...appears to be a creamy,straw,yellow, strong or more subdued
light would favour any of the aforementioned tones.
In my experience, I have never seen Reed Warbler with any comparable leg colour as per the images shown.