Are there any guides on the site for Asthma/copd?

Are there any helpful guidance notes on Asthmatic and COPD sufferers that also have some of the other medical conditions mentioned here.

I have already downloaded the fibromyalgia, mobility and depression abstracts, diary_templates. But I can't find anything relating to Asthma/copd. I know that a written letter from a locum at my old doctor surgery (closed due to retirement) really helped at my ESA Appeal. The Doctor that wrote it was a specialist in that area, who had retired but came to my GPS as a locum for a number of years a few days a week.

Any advice would be appreciated as currently trying to fill in PIP claim form. I was on a lifetime award of DLA but not due to move over to PIP
Thanking in advance.
Tina