Patch for merge_cube: Increases Iris' _MAX_CHUNK_SIZE if npoints of downscaling output exceeds this value (#684)
Patch for merge_cube: Increases Iris' _MAX_CHUNK_SIZE if npoints of downscaling output exceeds this value (#684)


metoppv/improver,metoppv/improver,fionaRust/improver,fionaRust/improver