A »For commercial stained glass projects in London and the South East, I'd start with the British Society of Master Glass Painters—their member directory lists experienced professionals who often handle larger-scale work. Another great resource is the CraftCouncil's search tool, which includes verified artists and studios. Many commercial projects require both design and structural expertise, so look for studios that specialize in architectural glass, such as Goddard & Gibbs (now part of a larger group) or Priory Studios in London. Local guilds like the London Craft Guild or South East Design Network can also provide vetted recommendations. Don't forget to check recent trade shows like Decorex or Focus/19 for suppliers who showcase commercial capabilities. Always ask for case studies of previous commercial installations and ensure they have appropriate insurance and glazing certifications. A good starting point is to contact three to five studios directly and request quotes based on your project specifications.