There may not be many operators to choose from but the Value of any of them compared to the UK market is way higher.

For example on PAYG services you pay a set amount, say $49, $69, or $99 to charge your phone and you get included international credit, cross network credit, free same network phonecalls on some networks to the value of $350-$1000 depending on the charge amount.

Shows another example of rip off britain really.