Q&E South

Overview

The Q&E South submarine cable is a 141 km fiber-optic link that will connect Cayeux-sur-Mer in France with Newhaven in the United Kingdom. Scheduled to be ready for service in 2026, the cable is designed to enhance digital connectivity between these two countries. Operated by euNetworks, Q&E South is part of the ongoing expansion of high-capacity submarine cable systems across Europe. The cable will serve as a critical infrastructure component, supporting data transmission needs for various sectors, including corporate networks, cloud services and consumer internet applications.

With its relatively short length, Q&E South is optimized for low-latency communication, making it a valuable addition to the broader European and transcontinental fiber-optic network. This new route will help to address the growing demand for reliable and high-speed connectivity between France and the United Kingdom, two of Europe’s most interconnected economies.

Route and Landings

The Q&E South cable spans the English Channel, connecting the northern French town of Cayeux-sur-Mer with Newhaven, a coastal town in southern England. The English Channel is one of the busiest maritime corridors in the world, and its strategic importance extends to data connectivity. By crossing this narrow but vital body of water, Q&E South provides a direct and efficient link between the two countries.

Cayeux-sur-Mer, located in the Hauts-de-France region, is a small coastal community known for its proximity to key economic centers in northern France. Its selection as a landing point leverages its geographic position to connect to France’s extensive terrestrial fiber-optic network. On the other side, Newhaven in East Sussex serves as a gateway to the United Kingdom. Its location near London and other major urban centers ensures that data carried by Q&E South can be quickly distributed across the UK. Together, these landing points create a robust and efficient pathway for digital traffic between the two nations.

Ownership and History

The Q&E South submarine cable is owned and operated by euNetworks, a European bandwidth infrastructure company. While specific historical details about the planning and construction phases of the cable have not been disclosed, its development aligns with euNetworks’ strategy of expanding its high-capacity network across Europe. The company’s focus on low-latency routes and strategic connections is evident in the design and purpose of Q&E South.

Set to be operational in 2026, Q&E South represents a significant investment in the digital infrastructure linking France and the United Kingdom. The cable will complement existing routes across the English Channel, providing additional capacity and redundancy. This is particularly important in light of the increasing reliance on digital services and the need for resilient communication networks in the region.

What Our Measurements Show

Our live monitoring of the Q&E South cable, conducted across 140 measured corridors, indicates promising performance metrics. The best recorded round-trip time (RTT) is 13 milliseconds, while the average RTT across all measurements is 53 milliseconds. These figures highlight the cable’s potential to deliver low-latency connectivity, which is critical for applications requiring real-time data transmission, such as financial trading, cloud computing and video conferencing.

The relatively short length of the Q&E South cable contributes to its efficient performance, as shorter cables typically experience less signal degradation and latency. Once operational, this cable is expected to provide a reliable and high-speed connection, further strengthening the digital ties between France and the United Kingdom. Our probes will continue to monitor its performance to ensure it meets the demands of modern communication networks.