Safety certificates section should allow notes

Some of my properties don't have gas or other certificates. I'd like a way to add notes that tell me there is no gas or whatever. At present if I don't add a certificate in it looks like I've forgotten to do it.

I've just had an instance where I instructed my gas certificate engineer to do a boiler check only to find it just has electricity. I assumed I had forgotten to do the certificate. Never assume - it makes an ass out of u and me.