What are the steps to get a Thai Non-O visa based on marriage for a British citizen?

To obtain a Thai Non-O visa based on marriage, a British citizen should first ensure they meet the financial requirements, which involves having 400K baht in their account for at least 2 months or demonstrating a monthly income of at least 40K baht. A simpler alternative is to apply for a multi-entry Non-O visa at the Thai consulate in Savannakhet, Laos, which does not require financial proof. This visa allows for multiple re-entries into Thailand while needing to exit every 90 days. After securing a 90-day Non-O visa, the individual should transfer the required funds, wait for them to be seasoned in the account, and apply for a yearly extension afterward. The process includes submitting necessary documents like marriage certificates and your wife’s ID to the consulate or immigration office.