Orange UK today announced their iPhone 4 prices and tariffs, making them the first UK network to officially disclose both their tariffs and prices (Vodafone leaked prices and tariffs are not confirmed).
O2 was the first to reveal their tariffs, but did not include their prices, so Orange has made the first move in the UK market and we would expect the other networks to follow quickly.
Here are the tariffs and prices on the iPhone 4 on Orange UK, including a breakdown of total cost for each plan.

* Note that Orange has a fair usage limitation on data of 750mb per month, so it is not quite unlimited.
Compared to the leaked prices from Vodafone that are yet to be confirmed, these iPhone 4 prices and tariffs from Orange is less competitive overall on both the 16gb and 32gb iPhone 4.
We will be back with a full comparison between the networks in our iPhone 4 UK Guide once more networks have confirmed their iPhone 4 price plans and tariffs.

No price war as Orange announces their UK iPhone tariffs