Well ask Leo, he made 'the Decision' to finalise the location. Here is a list of Leo's achievements to date. Source Leo's propaganda team.
"As Minister for Transport he made the decision to go ahead with the Luas cross city works, as Minister for Health he organised the Gathering and expanded the GP cards for under 6s and over 68s. He also made the final decision on the National Children's Hospital."
He made the decision on the las cross city to the detriment of Metro north, he organised the shakedown and made a big decision to locate a childrens hospital with limited parking in one of the most congested areas of Dublin. Well done leo.
Another big achievement of Leos was to reduce the VAT rate for the hospitality sector, if you talk to any hotelier or anyone in the hospitality sector and they'll say that's one of the major reasons they can attract overseas visitors to Ireland.
Great Leo because your party was able to this while taxing the bollox out of the rest of us.