So, there I was at Terminal 5 the other day on my way out to IFA in Berlin. I opened my all-too-heavy laptop expecting to reap the benefits of all the lovely Wi-Fi I’d heard about and what did I pick up – not a sausage; not so much as a secured, ultra-low signal from a mobile phone.

Now, if I were to try the same any time from today, I’d have a rather different experience. Search for a network in Heathrow T5 now and you’ll find one the size of 50 football pitches courtesy T-Mobile…