Channel Tunnel 2G and 3G services. Both EE and Vodafone planned to offer LTE services on the route; EE said it expected to cover the route with LTE connectivity by summer 2014. EE and Vodafone will offer Channel Tunnel network coverage for travellers from the UK to France. Eurotunnel said it also held talks with Three UK but has yet to reach an agreement with the operator. In May 2014, Eurotunnel announced that they had installed equipment from Alcatel-Lucent to cover Running Tunnel North and simultaneously to provide mobile service (GSM 900/1800 MHz and UMTS 2100 MHz) by EE, O and Vodafone.
Channel Tunnel at the English portal, caused concerns. Identified by the 1964–65 geophysical survey, the Fosse Dangaered is an infilled valley system extending below the seabed, south of the tunnel route in mid-channel. A 1986 survey showed that a tributary crossed the path of the tunnel, and so the tunnel route was made as far north and deep as possible. The English terminal had to be located in the Castle Hill landslip, which consists of displaced and tipping blocks of lower chalk, glauconitic marl and gault debris. Thus the area was stabilised by buttressing and inserting drainage adits. The service tunnel acted