Broadband Providers available in Slough include Sky Broadband, Virgin Media, and BT. Slough's fastest provider is Spitfire, with a median speed of 108 Mbps. The most popular provider in Slough is Sky Broadband. The average broadband speed in Slough in 2022 is 73 Mbps, and the median speed locally is 38 Mbps.
Slough is among the top 10 for fibre access out of all major towns in the South East, and is among the top 100 best major towns in terms of fibre access across the UK as a whole. Our analysis of Ofcom coverage data shows that Gigabit fibre is available to 50% of residents. UltraFast 300+ Mbps is available to 93% of residents, while SuperFast 30+ Mbps broadband is available to 100% of Slough's households.
Great broadband infrastructure results in high speed test averages in Slough postcodes like SL1, SL2, SL3, and SL95. Over the past year, we’ve recorded a 37.52 Mbps median internet speed in Slough, which is 1.87% above the United Kingdom national median of 37 Mbps.
Slough increased access to Gigabit speeds by 49 percentage points in the past year. The buildout rate is also better than neighbouring major towns like Horsham (gained 46 percentate points), High Wycombe (gained 34 percentate points), and Reigate (gained 18 percentate points). In addition, real-world speed test data shows that Slough is dramatically outperformed by Colnbrook with Poyle (94% faster).
We rank each provider relative to all providers in The United Kingdom based on their median download and upload speeds, measured round trip time latencies, and the percentage of speeds tests that exceed 50 Mbps.
Customer ratings are based on local reviews matched to Slough IP addresses. Providers can be scored on a range of 1 to 10, and ranked relative to all providers in The United Kingdom.
Median Speed Test Result
The median is the middle result in the range of tests we measured for each provider in Slough in the past year. Median speeds provide a better comparison than raw averages because they control for the longtail of tests related to Wi-Fi issues. The charts below represent the distribution of tests associated with each provider from low to high.
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See the chart below for annual reporting on fibre build rates in the Slough area. Availability is based on population in postcodes marked as served by Ofcom Connected Nations reports, according to the most recent census.
|1,000+ Mbps||300+ Mbps||30+ Mbps|
of people living in Slough can obtain to 1,000+ Mbps broadband speeds
of Slough residents can get 300+ Mbps internet service
Superfast 30+ Mbps Broadband
availability in Slough
Poor Broadband Speeds
of Slough is limited to broadband speeds under 30 Mbps
|Year||Slough Average||United Kingdom Average||Difference|
|2018||20.84 Mbps||26.27 Mbps||20.67% Slower|
|2019||33.8 Mbps||30.63 Mbps||10.35% Faster|
|2020||57.45 Mbps||80.31 Mbps||28.46% Slower|
|2021||71.01 Mbps||66.05 Mbps||7.51% Faster|
|Percentage of Speed Tests in Speed Range|
|Internet Speed Range||Slough||United Kingdom|
|Very Slow: under 10 Mbps||26.44%||19.92%|
|Slow: 10-30 Mbps||26.71%||25.74%|
|Adequate: 30-60 Mbps||19.35%||25.20%|
|Good: 60-80 Mbps||9.09%||10.20%|
|Fast: 80-300 Mbps||14.69%||15.33%|
|Very Fast: over 300 Mbps||3.72%||3.60%|
|City / Town||Max Speed||Typical Speed Range||Median|
|Greater London||5794.21 Mbps||33.01—95.79 Mbps||45.52 Mbps||Faster|
|Birmingham||941.32 Mbps||29.29—106.99 Mbps||38.46 Mbps||Faster|
|Bristol||943.13 Mbps||30.33—109.89 Mbps||42.25 Mbps||Faster|
|Edinburgh||874.24 Mbps||29.94—107.43 Mbps||38 Mbps||Faster|
|Slough||938.84 Mbps||28.64—97.39 Mbps||37.52 Mbps||-|
|Liverpool||1134.53 Mbps||25.52—89.55 Mbps||34.57 Mbps||Slower|
|Nottingham||2371.49 Mbps||16.23—40.55 Mbps||19.15 Mbps||Slower|
|Sheffield||932.42 Mbps||23.71—68.77 Mbps||32.05 Mbps||Slower|
|Glasgow||913.93 Mbps||20.58—71.34 Mbps||32.01 Mbps||Slower|
|Leicester||935.89 Mbps||27.43—99.15 Mbps||36.99 Mbps||Slower|
We class broadband speed distributions as follows: very slow under 10 Mbps; slow 10-30 Mbps; adequate 30-60 Mbps; good 60-80 Mbps; fast 80-300 Mbps; very fast over 300 Mbps.
|Position||City / Town||Max Speed||Typical Speed Range||Median|
|1||Colnbrook with Poyle||741.48 Mbps||24.43—107.29 Mbps||72.87 Mbps||Faster|
|2||Slough||938.84 Mbps||28.64—97.39 Mbps||37.52 Mbps||-|
We analysed the results of people in Slough testing broadband providers multiple times, with each test starting no more than 30 minutes after the previous speed test. On average, people in Slough ran 4 internet speed tests per session. Looking at broadband download speeds, if the Slough resident's final test is 10% faster than their starting download speed, we count that as a succesful and faster speed test result. We count an unsuccessful, slower result if the final result is 10% slower than the starting result; we'd hope their ISP contacts them ASAP! For broadband speed tests that don't vary by that much, we consider the final result to be the same. For Slough's residents, of the internet speed tests we measured, 40.61% were fast, 27.74% slow, and 31.66% broadly the same.
|Provider||Start Time||# Tests||Duration||Start Speed||End Speed||Status|
|Virgin Media||17 Jan 2022 23:30:54||2||36 secs||30.58 Mbps||299.84 Mbps||Improved|
|BT||17 Jan 2022 22:01:18||2||70 secs||147.19 Mbps||147.26 Mbps|
|Virgin Media||17 Jan 2022 21:39:26||2||37 secs||27.62 Mbps||30.54 Mbps||Improved|
|Vodafone||17 Jan 2022 20:26:50||2||12 mins||2.71 Mbps||1.21 Mbps||Needs help, very slow|
|BT||17 Jan 2022 19:41:44||2||29 secs||35.74 Mbps||35.96 Mbps|
|BT||17 Jan 2022 19:06:36||2||33 secs||142.68 Mbps||29.47 Mbps||Needs help|
|Plusnet||17 Jan 2022 18:40:28||2||27 secs||25.58 Mbps||26.04 Mbps|
|BT||17 Jan 2022 17:11:22||7||65 mins||22.9 Mbps||35.05 Mbps||Improved|
|BT||17 Jan 2022 16:27:52||4||12 mins||20.43 Mbps||15.87 Mbps||Needs help|
|Virgin Media||17 Jan 2022 16:13:59||3||55 secs||124.38 Mbps||185.02 Mbps||Improved|
|Sky Broadband||17 Jan 2022 15:34:00||2||22 mins||5.49 Mbps||5.67 Mbps||Needs help, very slow|
|BT||17 Jan 2022 15:45:11||2||2 mins||377.1 Mbps||489.5 Mbps||Improved|
|EE||17 Jan 2022 15:13:56||3||15 mins||29.65 Mbps||30.71 Mbps|
|Virgin Media||17 Jan 2022 14:36:54||4||23 mins||273.83 Mbps||202.05 Mbps||Needs help|
|BT||17 Jan 2022 13:26:47||9||64 mins||10.24 Mbps||26.49 Mbps||Improved|
|BT||17 Jan 2022 13:04:28||6||59 mins||448.71 Mbps||188.16 Mbps||Needs help|
|BT||17 Jan 2022 13:57:16||4||3 mins||67.15 Mbps||66.41 Mbps|
|BT||17 Jan 2022 13:56:53||3||2 mins||72.21 Mbps||72.43 Mbps|
|Virgin Media||17 Jan 2022 13:05:50||2||30 mins||27.79 Mbps||375.01 Mbps||Improved|
|Vodafone||17 Jan 2022 13:20:29||3||7 mins||22.48 Mbps||23.28 Mbps|
|#||Provider Name||Max Speed||Typical Speed Range|
|1||Virgin Media||938.84 Mbps||63.31—216.64 Mbps|
|2||Spitfire||193.37 Mbps||66.21—167.67 Mbps|
|3||BT||913.25 Mbps||28.91—77.11 Mbps|
|4||Independent Fibre Networks||238.36 Mbps||39.47—78.22 Mbps|
|5||CIX||94.15 Mbps||18.52—93.08 Mbps|
|6||Gigaclear||82.5 Mbps||18.68—43.05 Mbps|
|7||EE||922.39 Mbps||22.04—61.17 Mbps|
|8||TalkTalk||427.6 Mbps||37.02—58.22 Mbps|
|9||Vodafone||468.71 Mbps||24.66—60.24 Mbps|
|10||Sky Broadband||510.67 Mbps||21.1—61.97 Mbps|
|11||Zen Internet||191.31 Mbps||5.58—69 Mbps|
|12||uno||46.75 Mbps||1.34—42.61 Mbps|
|13||Plusnet||74.61 Mbps||7.77—35.58 Mbps|
|14||FastNet||16.46 Mbps||0—16.38 Mbps|
|15||Shell Energy||54.95 Mbps||5.82—27.36 Mbps|
|16||O2 Broadband||415.06 Mbps||5.44—25.33 Mbps|
Slough has 16 ISPs tested by its 149,112 residents.
Spitfire is the fastest broadband provider in Slough with 193.37 Mbps, and an average internet speed range of 66.21—167.67 Mbps.
The best internet provider in Slough is Virgin Media, and their users typically see broadband speeds in the range of 63.31 to 216.64 Mbps.
Users in Slough see an average internet speed of 28.64 up to 546 Mbps, and the fastest speed we've seen is 938.84 Mbps.
Broadband service from Sky Broadband is available in Slough, and the fastest speed we've seen from them is 510.67 Mbps.
Broadband service from Virgin Media is available in Slough, and the fastest speed we've seen from them is 938.84 Mbps.
Broadband service from BT is available in Slough, and the fastest speed we've seen from them is 913.25 Mbps.
Yes, BT offers full fibre to the home (also called FTTH or FTTP) to 1498 of Slough's postcodes.
The broadband provider with the most users in Slough is Sky Broadband.
Author: Thomas Buck
Last Reviewed By: Tyler Cooper
Published: 10 Nov 2019
Last Updated: 17 Jan 2022