London has the slowest average 4G download speeds in the UK, according to a report from OpenSignal and Which?.
The State of Mobile Networks: UK report reveals that the capital has the best 4G coverage in the UK, allowing people to connect almost 70 per cent of the time, but has the slowest 4G download speeds at an average of 18.8Mbps.
Northern Ireland has the fastest average 4G speeds of the 12 regions covered in the report at 23.3Mbps, followed by Yorkshire and Humberside and the East Midlands with 22.8Mbps.
Yorkshire also ranks second best behind London when it comes to 4G coverage, providing a connection 61.3 per cent of the time. Wales ranks at the bottom of the list with a 4G figure of just 35.4 per cent.
Alex Neill, managing director of home and legal at Which?, said: "This latest research confirms that the rest of the UK is lagging behind London when it comes to accessing 4G signals.
"It's clear that mobile providers must do much more to improve their networks if they are to provide greater access to their customers."
OpenSignal and Which? also cast a critical eye over UK mobile operators, naming EE as best for 4G speeds at 28Mbps and availability at 64.1 per cent.
Three comes in second for download speeds at 24.5Mbps, but is at the bottom of the list for availability at 43.7 per cent.
Brendan Gill, CEO and co-founder of OpenSignal, said: "There was a lot of good revealed in our data about UK operators. Mobile data speeds, 4G and overall, were consistently fast in our tests throughout the country.
"But there are definitely still some areas in which the UK needs to improve. Finding a 4G signal outside London can still be a bit tricky."
Which? called on Microsoft last month to honour the rights of its customers after a survey found that 12 per cent of those who upgraded to Windows 10 from an earlier version had rolled back and that many more were unhappy with the upgrade.
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