London Falls to Last Among European Capitals for Mobile Speed: Ookla

By Daniel Okafor, Senior Correspondent

London ranks last among 18 European capitals for median mobile download speed, Ookla reported on October 19, 2026. The UK capital slipped from seventh place in 2021.

Its median speed rose nearly sevenfold to 109.43 Mbps between Q1 2018 and Q3 2026. Other capitals improved faster, and London now trails the field on three core metrics at once.

Since early 2023, the city has held the slowest median upload of the 18 capitals every quarter. It also records the highest latency under load for the worst 10 percent of samples, Ookla stated.

"London's mobile networks have not kept pace with that demand," Ookla reported.

What pushed London to the bottom?

5G adoption has outrun 5G capacity additions over the past five years. The share of Speedtest tests on 5G in London nearly doubled to 80 percent by Q3 2026.

London's median 5G download fell from 200 Mbps in Q2 2021 to 133 Mbps in Q3 2026. That contraction left the capital with the slowest 5G median among the 18 capitals measured.

Paris, a comparably large European capital, has held its 5G median above 225 Mbps since mid-2021, a 92 Mbps lead over London in the latest quarter.

Where is the network most strained?

Capacity shortfalls hit hardest where commuters converge during the working week. In the City of London and Westminster, weekday lunchtime downloads run 27 percent slower than weekend readings.

Latency under load rises 26 percent during the same window, Ookla data show. London still posts the lowest absolute mobile latency of 15 UK cities in the study, anchored by its position at the UK's internet backbone.

That structural advantage disappears once per-cell load peaks between Tuesday and Thursday midday.

Why is new capacity so hard to add?

Mast applications in London have collapsed since 2022, falling by more than four-fifths. Almost three in four mast applications decided since 2019 ended in refusal, Ookla reported.

5G phones in neighborhoods fully covered by conservation areas spend about 4 percentage points less time on 5G than peers elsewhere in the same borough. Planning rules and heritage zones now block the densification that other capitals completed without similar friction, leaving London boroughs with more rejected applications than built sites.

How does income reshape the picture?

London's least affluent neighborhoods register 18 percent faster mobile downloads than its wealthiest ones. Within a single borough, roughly a third of that gap traces to phones spending more time on 5G.

About a sixth stems from denser nearby populations that justify operator investment in additional cell sites. The data counter the usual assumption that mobile speed tracks neighborhood wealth.

What does the next capacity cycle look like?

Operators face a planning bottleneck rather than a spectrum shortage as the next densification round approaches. Ookla's Q3 2026 measurement sets the baseline before any 2027 planning reforms appear in operator filings.

The next quarterly Speedtest update will reveal whether London's median can climb out of last place, or whether heritage-driven refusals continue to suppress new sites across the capital.