How do broadband connectivity and speeds vary in different parts of the UK? Here you can browse data for constituencies and small areas, and download postcode-level maps for any constituency in the UK.

These estimates are based on our analysis of Ofcom’s Connected Nations 2018 report and Summer 2019 update. Coverage data relates to May 2019 and speed data relates to May 2018. See the notes below the dashboard for full information and sources.

How to get started: Use the dropdown menu below to select a constituency. Hovering over data tables will show charts comparing the area to the national average.

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download Excel data Download all constituency data in Excel (1.01 MB)


Data source

The analysis is based on postcode-level and output area-level data on broadband coverage and performance from Ofcom’s Connected Nations 2018 report and summer 2019 update. Geographical data is sourced from ONS Geography.

Data updates

We aim to update this dashboard three times a year, in line with data releases from Ofcom, but the data shown here may not be the latest available. MPs and their staff can contact the Commons Library with queries about updates.

Definitions of measures

  • Superfast Availability: the percentage of lines that were capable of receiving download speeds of at least 30 Mbps in May 2019 (this is Ofcom’s definition of ‘superfast’ – the UK Government uses 24 Mbps as its definition). Superfast availability doesn’t mean that all lines are actually receiving superfast speeds, because this often requires consumers to subscribe to specific packages.
  • Average download speed: speeds actually being received in May 2018 based on the mean average. This may reflect consumer choice as well as line quality, since users sometimes have access to packages offering higher speeds than those they are actually receiving. Note that the postcode PDF maps show the median average download speed in each postcode.
  • Unable to receive decent broadband: premises below the Universal Service Obligation – those unable to receive 10 Mbps download speed or 1 Mbps upload speed, which Ofcom regards as necessary components of ‘decent broadband’.
  • Lines receiving under 2/under 10/over 30 Mbps: the percentage of premises whose lines were receiving these speeds. Note that lines receiving slow speeds may nevertheless be capable of receiving superfast speeds.

Guide to sub-constituency areas shown in the bottom table

  • England and Wales: Census MSOAs – viewed on an interactive map
  • Scotland: Census Intermediate Zones – interactive map coming soon
  • Northern Ireland: 2015 Wards – interactive map coming soon; view PDF map (1.73 MB)

Postcode maps

In larger constituencies, the postcode maps can be very crowded. Maps of smaller areas can be provided to MPs and their staff on request.