This data includes the average fixed-line broadband speed by output area, based on 2016-2022 data released by Ofcom. The source data file is linked below.

For 2016 and 2017, CDRC aggregated the supplied postcode data by output areas as defined by the 2011 Census (OA11CD) and the smallest areas for which extents are openly available.

For 2018-2021, Ofcom now itself aggregates by OA11CD, on its Connected Nations data downloads website. For 2022, some data was aggregated by Ofcom by OA21 and some by OA11CD. We have allocated the OA21 to OA11 geographies on a best-fit basis to allow for continued comparison.

Content

Data files are available for download below. They include measures of data coverage and performance. Please also see the variable dictionaries for guidance on the column meanings, as well as data summaries for overviews of the data. These are also available for download below.

Quality, Representation and Bias

The data are compiled by a national regulator and are believed to therefore be high quality. Their process of estimating what the residential/non-residential dwelling populations should be, and matching it to actual data supplied by network operators, can lead to a loss of precision where the numbers don't align well.

Note that the 2022 best-fit comparision necessarily involves a slight loss in quality due to the best-fit allocation process, which can be on a many-to-many population basis for a small number of areas which have see recent rapid population changes.