The UK is "reasonably well placed" to cope with a large-scale cyber attack, a report by a group of peers has said.
The Lords EU Home Affairs sub-committee said the internet was under constant threat of disruption from the actions of cyber-criminals and hostile states.
But they said Britain was leading the way in cyber-security within the EU.
And they warned that a plan to simulate the shutdown of the entire EU phone network this year was "over ambitious" as many member states were not ready.
The committe heard from experts, including cyber-security minister Lord West who said measures put in place by the surveillance service GCHQ had improved the UK's readiness to prevent cyber-attack.