Tappers Dad: So I just typed in aircraft fuel leaks into google and all that seemed to come up was stories on Nimrod.
This illustrates much of my point. XV230 was lost as the result of a fuel leak; this sets a precedent for reporting news of Nimrod fuel leaks as there is a greater public appetite for Nimrod fuel leaks than on an Airbus/Boeing transporting you across the ocean.
Notwithstanding the lack of reports on fuel leaks available open source via a google search, any aircraft will leak fuel, and part of the operating manuals will state what sort of leak rate is allowable, and where.
It might not be in the interests of public confidence in flight to inform potential passengers how many leaks their prospective aircraft has currently or in the recent past, which is not to say that leaks would necessarily be denied if an airline were asked directly. The results of such a question are more than likely to be akin to asking Tesco if they support underpaid workers in sweatshops in order to purchase cheap clothing.