The five green buses are RF-class ex London Country AEC Regal IVs with Metro-Cammell bodywork, they are reported as RF43 (LYF394), 113 (LYF464), 197, (MLL584) 308 (NLE527), 673 (NLE673) - but they don't carry these registration plates in the movie as they are supposed to be German and they have false plates!