This website has some good resources if you are looking to find out more about current issues in relation to internet safety: 

https://www.internetmatters.org/

You may find the following link useful for videos that discuss many different factors of online safety: 

https://www.youtube.com/user/internetmatters/videos

Follow this link for some resources that may be useful for starting discussions about social media use and trust in online content: 

https://www.childnet.com/resources/online-safety-activities-you-can-do-from-home

This link will take you to the BBC bitesize page with support videos regarding fake news and social media:

https://www.bbc.co.uk/bitesize/tags/zr2yscw/fact-or-fake/1

This link will take you to the CEOP website and explains how to report to different social media sites: 

https://www.thinkuknow.co.uk/11_13/help/Contact-social-sites/