This dataset contains measurements of greenhouse gas exchange (carbon dioxide and methane) over a near natural blanket bog in the Flow Country, Caithness and Sutherland, using eddy-covariance, and associated meteorological and pedological measurements from 2016-10-19 to 2022-12-31 at half hourly intervals. The time series has been gap filled to allow the calculation of annual budgets for carbon exchange. The site reference is UK_CLs ( http://www.europe-fluxdata.eu/home/sites-list ) Full details about this dataset can be found at https://doi.org/10.5285/41acfe3e-761b-4362-bcc7-8d49ce52cc35