How and who do I talk to RSPB about promoting my product?

[David]

I need to talk to the RSPB or National trust or someone like that to ask them if they will help with the sale of my product who and how do I speak to them.

[robert m]

Two ways - Contact HQ via website. Or go to your local RSPB or NT property and enquire locally.
Your product needs to be complementary to theirs, so you need to invest some time in developing a business proposition/business case to justify your approach