I've recently noticed my skin is dry, but it's only obvious when erect. At its worst, it looks like it's peeling. It's not smegma. I wondered if anyone had any advice or suggestions? It doesn't seem serious enough to warrant a GP visit. I am not using any odd cleaning products - just soap - so am unsure what the cause is.

Daniel, even some soaps can cause this: do you ONLY use 1 particular type of soap or do you have access to and use different ones?
Essentially, I could give you a great deal of detail on this - but the essential is you take things back to basics as i would describe - this means the ONLY thing that should contact your distressed penile skin is water for washing. You also need to carefully dry the skin with a fluffy type rather than a hard surface towel as even this can cause further damage.
Your penile skin will take a number of months to go through the process of repair healing and strengthening - as long as no further distress takes place.
Unfortunately, sex and masturbation can delay this process and the ideal is to abstain from these until your skin has recovered.