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.
Related to bias - I recently installed the plugin from https://mycognitivebias.com/ which explains a cognitive bias each time I open a new tab.
I cannot proclaim that this has altered my work or personal life yet, but it has opened my eyes to the number of them and the wide circumstances in which they occur.
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.