Nothing is certain in law, so, having been caught out, newspaper was going to go for cheapest , low risk option.
Probably recouped the costs in increased circulation
I presume you missed the part of the Leveson inquiry which dealt with the media abuse suffered by Kate and Gerry McCann.
The Express Group amongst many others abused the power of the press to libel and defame ... in my opinion they knew they hadn't a leg to stand on as English Law is quite clear on that issue ... therefore you are correct they chose the path of least resistance because the alternative could have been disastrous for them.
The Real McCann Scandal23 OCTOBER 2008
Brian Cathcart details how the British press set out to systematically destroy the parents of Madeleine
Snip
Error on this scale, involving hundreds of "completely untrue" news reports, published on front pages month after month in the teeth of desperate denials, can only be systemic. Judging by what appeared in print, it involved a reckless neglect of ethical standards, a persistent failure to apply even the most basic journalistic rigour, and plenty of plain cruelty.
No explanation has emerged besides the obvious one: that this was all done to sell newspapers. Seeing the scale of public interest, it looks as though editors were ready to publish stories, and reporters were ready to write them, even when they had no merit whatsoever.
https://www.newstatesman.com/law-and-reform/2008/10/madeleine-mccann-daily-british