Definitely include your marriage certificate (the list does not cover all situations)
Unless your son is also applying for a visa then he does not need to be included.

 

I agree with Crawford, definitely include the marriage certificate. They normally do want the passports/birth certificates for any children you have (even if they are British and not "dependants" on the visa) so you may as well include them. I would put these all under the "Life Events" section.

 

Thank you so much - I was going to say although he is British and doesn't need a visa, surely they want to know he exists? haha

 

It doesn't mention needing my BRP either - should I include?
I can't think of anything to add into the proof of business, medical or educational section. Are they okay to be empty?

 

I am pretty sure I included a scan of my BRP when I applied for ILR several years ago. They'll ask for your original BRP at the biometrics appointment also

 

Thank you - this is all so confusing why do they make it this way!