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 2019 report and Spring 2020 update. Coverage data relates to May 2020 and speed data relates to May 2019. 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.

Open a printable version
Download all data in Excel (1.01 MB)

If you would like to access this information in an alternative format please email and we will review your request.

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 2020 (this is Ofcom’s definition of ‘superfast’ – the UK Government uses 24 Mbps as its definition). Superfast availability measures the speeds available to consumers in an area. It doesn’t show the proportion of lines that are are actually receiving superfast speeds, because consumers often need to subscribe to specific packages in order to receive superfast speeds.
  • Average download speed: speeds actually being received in May 2019 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 in May 2020 – 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 30 Mbps: the percentage of lines actually receiving superfast speeds in May 2019. Note that this does not show what lines are capable of receiving. Some lines not receiving 30 Mbps have the option of faster speeds available to them. A lower-than-average figure on this measure may indicate that consumers have chosen not to (or are unable to) adopt superfast packages, rather than worse connectivity in the area. 
  • Lines receiving under 2/under 10 Mbps: the percentage of lines receiving these speeds in May 2019. These lines may have access to higher speeds (as explained in the previous bullet point). However, a high percentage of lines receiving under 2/under 10 Mbps suggest that the speeds available to basic broadband subscribers are low and below Ofcom’s threshold for ‘decent broadband’.

Data source

The analysis is based on postcode-level and output area-level data on broadband coverage and performance from Ofcom’s Connected Nations 2019 report and spring 2020 update. Geographical data is sourced from ONS Geography.

Guide to sub-constituency areas shown in the bottom table

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

Postcode maps

Please note that the postcode maps are still displaying data from May 2019 (connectivity) and May 2018 (speeds). We are not able to update these at the moment but hope to do so soon.

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