@Beebumble2
I have been an RHS member for several years, not only do you get into their specific gardens, but also smaller partner gardens for half price.
Every month there is a magazine full of interesting articles. We take advantage of the members days at the flower shows, not only cheaper tickets, but less crowded.
More precisely - the membership allows free entry to an RHS garden for the member accompanied by a relative. And free entry for the member to a number of other gardens at particular times of year. So if you are a couple, effectively half price.
Other benefits: access to their plant advice service, for ids of plants and diseases, cheap seeds, up to a dozen packets for something like £8.
We calculated that our trips to Harlow Carr were enough to cover the membership, meaning the magazine was free. It was unquestionably good value when I was working in London, dropping in free to the monthly shows on my way home from work.
It’s a much better organisation now, a lot of focus on children and bringing in the new generation, and the orientation is towards sustainability and the ordinary gardener, rather than the owner of a large house and her head gardener.