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A recent report from the media regulator Ofcom has revealed that mobile phone signal on trains across Britain is frequently inadequate for common online activities such as scrolling through social media or streaming video content. Despite efforts by network providers, the overall quality of service on trains falls short of what is considered a “good performance” standard. According to Ofcom’s findings, Vodafone met these performance criteria only 17% of the time, while EE was the leading network, reaching the threshold 42% of the time.
Mobile UK, an industry group representing major phone companies including EE, Virgin Media O2, Vodafone, and Three, acknowledged the complex challenges in delivering reliable coverage on moving trains. They pointed out that structural and capacity issues are difficult to overcome, particularly given the nature of train travel and the infrastructure required. Ofcom has urged both the mobile networks and local authorities to improve cooperation and step up efforts to enhance mobile connectivity on rail routes. Alarmingly, the regulator discovered that some local authorities have rejected over 90% of infrastructure upgrade applications in the past five years, posing a significant barrier to progress.
The report employed thorough testing on 24 different rail sections throughout England, Scotland, and Wales. Ofcom’s benchmark for “good signal” was defined as a minimum download speed of 5 megabits per second, upload speeds of at least 1.5 megabits per second, and a latency no longer than 50 milliseconds. These requirements are necessary to support everyday uses like video calls, social media browsing, and video streaming. Unfortunately, networks failed to consistently deliver even these modest standards. Three and O2 met the good performance threshold only 21% and 20% of the time, respectively. In addition to poor external coverage, the study highlighted issues such as weak signals from masts near tracks and the blocking effect of some train carriage designs.
Train Wi-Fi services performed even worse, providing satisfactory speeds a mere 1% of the time, with companies being criticized for relying on outdated technology and overly restricting internet bandwidth. The Department for Transport has announced plans to invest £57 million toward improving connectivity, a move expected to be formally detailed this summer by the Transport Secretary. Meanwhile, Mobile UK has called on the government to implement planning reforms and increased funding, emphasizing that taxpayer contributions will be necessary to address network black spots that commercial rollouts alone cannot fix. The Department for Science, Innovation and Technology has been contacted but has yet to provide a response
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