"So a terrorist gains access to sever the cable connections effectively shutting the internet down to the UK and America."
It will likely impact GTT and their customers, but have minimal impact on UK Internet access due to connection diversity.
"And so what we have satellite technology which can be diverted from the cable solutions. ohh about 10 minutes disruption at most."
Have you used satellite Internet connectivity? It's fine for bulk downloads where latency isn't an issue but otherwise it sucks. Plus International fiber resilience is unlikely to require this.
It might play into the Mail's thinking on getting people off the Internet and focusing on other activities though. Or give Mail journalists to make some more tea and brew up their next storm...