A Los Gatos Research (LGR) 913-0015 trace gas analyser, serial number: 14-0244, used at Tacolneston atmospheric monitoring station. The analyser uses off-axis integrated cavity output spectroscopy (OA-ICOS) to make in situ measurements of N2O and CO in the mid-infrared spectral region - see Baer et al. (2002) for details of this technique: https://doi.org/10.1007/s00340-002-0971-z