How can I apply for a holiday visa for my Thai girlfriend to travel to the UK?

The process of applying for a holiday visa for a Thai girlfriend to travel to the UK appears to vary in difficulty based on personal experiences. Some users recommend utilizing an online application and meticulously ensuring all requirements are met, accompanying the application with documented proof. Others suggest hiring an agent for convenience, indicating costs around 30k Baht, for a less stressful experience. Some have successfully navigated the application process independently and found it straightforward, having received visas for durations of six months to two years without significant issues. Overall, thorough preparation is key.