Seen this cracker of a deal in Home Bargains and they had stacks of them in stock too.
Although it is nowhere near World Cup time it might be worth buying a couple to show your patriotism towards the England Football team
Then again dont see why you couldn't use it to fly the flag for the national Rugby/Cricket/Volleyball team ;-)
We could also all buy one and put it in our cars on St. Georges Day (April 23rd), just to let everybody know when it is :D
Anyway whatever your reason for flying this on your car its a bargain at 29p so make sure you get one from your local Home Bargains. Can beat a bit of patriotism.
EDIT: Cold Voters write a reason before pointlessly voting cold (Why do i have to keep writing this, it should be compulsory for these annoying anonymous cold voters)