To take up the offer, just follow one of the links below. It doesn't matter which one you choose, because the World subscription package gives you access to the same huge record collection no matter which of the FindMyPast territories you purchase it through. However, you may have a preference based on the currencies in which payment will have to be made.
Taking the discount into account, the cost of the annual subscription is: €161.55 | US£215.55 | £140.36 | AUS$215.55. In each case, it is charged in one up-front payment and gives you access to eight billion records.
If you've been paying attention, you'll be aware that FindMyPast's free access to a selection of its Irish collection comes to a close tonight (just before midnight GMT).