This is coming out next Friday (Sept 9th), and this the cheapest preorder price by far. Amazon will likely up the price before release day, although their price promise guarantees you pay the cheapest price they list it at.
PS3 versions has not dropped as of yet
First class postage £2.03 extra (up to 2 business days)
Expedited (1 business day(s)) £7.15 extra