Chiffchaff or Willow Warbler

Chiffchaff or Willow Warbler

Observation - Chiffchaff or Willow Warbler - UK and Ireland. Description: Legs are dark (Chiffchaff?), eye stripe relatively long? (W/Warbler?), yellow colouring relatively m

Legs are dark (Chiffchaff?), eye stripe relatively long? (W/Warbler?), yellow colouring relatively muted (Chiffchaff?)
Still can't settle this debate.