Basic room in/around London wt good transport link

Hi, I’m looking for a room in a shared accommodation in Essex or any location in greater London (with good transport links to central London). I will be away the first 6 months, possibly longer. I will work remotely (research) and I’ll need to be in London once every 6-8 weeks max. Not fussed about the room as I won’t be around too much. Get in touch if you have anything that fits the description, thank you