Since it's under £5, SoftUK add £1.49 for the postage.
Quote from the site, when you add to basket and then go to checkout/confirm order.
£1.49 Postage & Packing charge has been added to your order as the value of your order is £4.99 or less. Please increase your order value to over £4.99 to receive your affiliate free delivery
The total of your Softuk order including UK delivery is: £6.48
Well anyway, even for £6.48 it's a pretty good game. I got it for £5 used at Gamestation.