What are the best practices for applying for a Thailand police clearance certificate as a UK citizen?

A UK citizen is seeking advice on how to fill out the application form for a Thailand police clearance certificate. Although parts of the application are in English, they find it unclear. Community members suggest using the Google Translate app, applying through the UK government's website for criminal record checks, and clarify that an O-A visa requires a police check from the home country. Additional comments inquire about forms for obtaining a police certificate for time spent in Thailand and ask for updates on the application process.