The Guardian has gone downhill in the last few years, just like the rest of UK mainstream news reporting. They have rolled over to do whatever the Government wants not reporting - take Assange for example.
Their coverage is practically non-existent.
I used to buy The Guardian every day, then I subscribed digitally. And then when their reporting slid downhill, I stopped subscribing. I still read it - but block their data scraping scripts and all ads. They are not worth supporting IMO.
FB will 'apologise' and promise a 'full investigation'.
This is a well-worn track pioneered by Google, a track that leads to a trove of data and no fines, no penalties.