Wright, G. (2021) China Mac: from attempted murder to leading a protest movement. Available at: https://www.bbc.co.uk/news/world-us-canada-55945949 (Accessed: 17 February 2021).
Diabetes UK (2019) Meeting type 2 treatment targets could save NHS millions. Available at: https://www.diabetes.org.uk/about_us/news/meeting-treatment-targets-could-save-nhs-millions (Accessed: 22 August 2019).
SGUL (2021) National student money week 2021. Available at: https://www.sgul.ac.uk/news/national-student-money-week-2021/ (Accessed: 11 February 2021)..
Where a web page has no obvious author, whether an individual or an organisation, use the title of the web page. If there is no obvious author, consider whether this is likely to be suitable information to use for academic research.
Illustrations of the houses can be found online (Palladio's Italian villas, 2005).
Note that the title is written in italics, just as it appears in the reference.
Palladio's Italian villas (2005) Available at: http://www.boglewood.com/palladio/ (Accessed: 09 March 2021).
Cite Them Right advises you to write no date in full in both your citation and reference:
Digital video can be compressed (New Media Republic, no date).
New Media Republic (no date) Compression. Available at: http://www.newmediarepublic.com/dvideo/compression.html (Accessed: 09 March 2021).
If you find that lots of your sources are missing dates, ask yourself if you might be able to find a better, more reliable source for your work. eBooks are just as good, if not better than, websites for background information and have the benefit of including all the necessary bibliographic information at the beginning of the book.