Below is a YouTube playlist (40 minute total) I put together to help make the biology of cannabis easier to understand (I hope). 

It discusses:

- The Endocannabinoid System (our bodies produce some cannabinoids and we have receptors)

- Cannabinoids (e,g, THC, CBD, CBG, CBN)

- Terpenes (smelly but healthy)

- The Entourage Effect (different components complementing one another)

https://www.youtube.com/playlist?list=PLHxQLz4lTgPU6BCZqQk4QDM3PMWSgoILl

Here are some links so you can read the basics about these topics

https://www.health.harvard.edu/blog/the-endocannabinoid-system-essential-and-mysterious-202108112569 [Accessed 5th July 2022]

https://cannigma.com/plant/cannabinoids-and-their-effects/ [Accessed 5th July 2022]

https://www.leafly.com/news/cannabis-101/list-major-cannabinoids-cannabis-effects [Accessed 5th July 2022]

https://thecannabispages.co.uk/medical-cannabis-101/terpenes/ [Accessed 5th July 2022]

https://www.essentiapura.com/the-entourage-effect-explained/ [Accessed 5th July 2022]

And whether your knowledge of cannabis in a medical context is negligible or really quite advanced, if you're wanting a dynamic resource exploring current areas of research and sharing stories of successes, I'd recommend you consider signing up for the Effective Cannabis Newsletter. It's international, not UK specific, but it's informative and varied and because they only select a handful of topics each month, it isn't overwhelming, so you're more likely to actually look at it (I speak from experience):
https://www.effectivenewsletter.com/

FURTHER READING 

Russell C, Rueda S, Room R, Tyndall M, Fischer B. Routes of administration for cannabis use - basic prevalence and related health outcomes: A scoping review and synthesis. Int J Drug Policy. 2018 Feb;52:87-96. https://doi.org/10.1016/j.drugpo.2017.11.008 Epub 2017 Dec 22. PMID: 29277082. Available at: https://pubmed.ncbi.nlm.nih.gov/29277082/ [Accessed 5th July 2022]

Cannabis Oil vs. Dried Flower: How Do They Compare? Plantedu.com (November 2018)

https://plantedu.com/cannabis-oil-vs-flower [Accessed 5th July 2022]