If you're looking for some 4G LTE of a British flavor to go with that new iPhone 5s or iPhone 5c then O2 is making a new play for your custom. In a refresh to the carrier's 'Refresh' and 'Simplicity' packages, 1GB of 4G LTE data can be yours for as little as £17 a month.
The caveat there is that particular deal is on O2 Refresh, where the price of a phone and cellular plan are split into separate entities, so you would have to factor the cost of a phone in on top of that. And honestly, 1GB is a bit of a waste when it comes to 4G LTE. For a little more on the same plan you can get 5GB for £22 or 8GB for £27.
On the SIM-only tariff, Simplicity, prices for 4G LTE start at £21 a month on a 12-month term, with 5GB and 8GB available for £26 and £31 respectively. For many iPhone owners, it's these plans that may prove most enticing. In addition to this, existing O2 customers will see an increase in their data limits, and can migrate to a 4G contract providing their current plan has at least 1GB of data allowance on it.
For more, see the O2 4G site at the link below. Any of these deals sound enticing?