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<p>Officials at the Department for Transport are working with both the French Government
and industry to ensure that when the European Train Control System (ETCS) signalling
is fitted on the high speed lines in both France and the UK it will be compatible
with the ETCS system in the tunnel. Before ETCS is fitted on all three networks, trains
using the tunnel will have to have more than one on board signalling systems (ie a
Tunnel compatible one and an ETCS one) and there will be a handover between the systems
as they move from one piece of infrastructure to another. The UK Government is considering
what specific provisions need to be part of any exit agreement to ensure continuity
of services using the tunnel.</p>
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