For those of you that undertake commercial and industrial emergency lighting installations. I would like to know what and how you provide lighting design information in compliance to BS5266-1 final certification. I'm currently looking to use third party provision. Using photometric data is a minefield for me and spacing tables are not always available for all fitting and various lighting manufacturers software are complex to me. I know that the client should undertake a risk assessment as probably in the best position to do so and then work with a designer, but the building designers seem to throw it back to electrician. I wondered what other installers did.