The UK Government website on this topic if full of encouragement to export to Iran. So I am hoping things are getting easier. At this date (August 2017):
1 How easy is it to get paid now?
2 I am confused about the list of goods that may require an export licence. How can I ask if my product will require a licence while at this stage not having a specific customer in Iran to specify?
I hope you get an answer to your question shortly.
In the meantime, I recommend also looking at the Institute of Export and International Trade’s helpdesk for more specific advice:
The OTE team