As you might imagine, there are some good places in London to think about trying out for a London recording studio. The city itself is absolutely massive, so there is no shortage of competition for recording booths. One place I quite like myself is called Select Recording Studios (https://selectrecordingstudios.co.uk/). They are good, and they are based in Woodgreen, too!
I like it here because they have access to everything you need. They cover mixing, mastering, song production and audio recording – as you have probably found, some booths only offer some of these features. At around £50 per hour, SRC is a pretty affordable place to turn to. It could be a good choice if you are looking to get involved with a studio in the Woodgreen area on a schedule.