Pipit, Bunting, Finch or Sparrow?

Pipit, Bunting, Finch or Sparrow?

Observation - Pipit, Bunting, Finch or Sparrow? - UK and Ireland. Description: 4 of these spotted flitting about the tree tops at Lee Valley RP Waterworks Nature Reserve. Not sure if they're pipits, buntings, finch or sparrows. Any concrete ideas, please?

4 of these spotted flitting about the tree tops at Lee Valley RP Waterworks Nature Reserve. Not sure if they're pipits, buntings, finch or sparrows. Any concrete ideas, please?