What are the options for obtaining a multiple entry Non-O visa in Thailand?

Steve is inquiring about the process of applying for a Non-Immigrant multiple entry visa at the London embassy, but can only find information about the single entry option. Responses indicate that the multiple entry Non-O visa is no longer available due to changes in the eVisa system, and now only 90-day Non-O visas are issued. To obtain a year-long stay, Steve should consider applying for a Non-OA visa instead, which allows for a year extension under certain conditions. Furthermore, advice on managing re-entry permits and staying outside Thailand for extended periods is discussed.