While on our recent trip to the UK and Israel both my son and I needed periodic internet access. He was lugging a laptop, I was not! I was surprised to find free wireless access in Trinidad, Barbados and Tel Aviv but not in London. Both Heathrow and Gatewick required payment.
We had access from the hotel in Haifa - no problem there.
On returning to the UK to see my parents near Morpeth, we went looking for internet access only to find no wireless access and no internet cafe in Morpeth. And on a visit to the city of Newcastle-upon-Tyne we could find no internet cafe there either. So - travellers be warned.