We decided to walk the stubble field in case there really was a Lapland Bunting lurking in there. Our efforts produced about 15 Skylarks and several Reed Buntings and Meadow Pipits. We gave up.
However, an hour later as we approached Netherstead we heard a loud "dew" call like a Snow or Lapland Bunting. Again we didn't see what made the call, but we decided to try more stubble walking. Still no result though.
Just chasing shadows.