Darat requested any evidence that that the recent negotiated agreement not to continue their developments was being circumvented and they carried on research. That is what Mycroft claimed, and it would indeed be nice to see something which backs that.
Let's go to the videotape (2004, during the specific period in question):
http://www.freerepublic.com/focus/f-news/1306396/posts
- Iran's chief delegate to the Vienna-based International Atomic Energy Agency said that Iran would press ahead with its nuclear program.
This is the part that clearly support Mycroft's contentions ("hypothesis" as Darat calls it) -----
One Western diplomat close to the IAEA said the deal between the EU's "big three'' and Iran actually permitted Tehran to convert an entire batch of 37 tonnes of yellowcake, with which it had been 'testing' its conversion facility at Isfahan.
When Iran announced its plans to test the Isfahan plant in September, nuclear experts said that 37 tonnes of yellowcake could yield enough uranium for up to five nuclear weapons, if it was later enriched to bomb grade purity.
Anyway, although I'm not an expert, this sure looks like Iran circumvented the negotiations process, and went ahead with their program.
And, more importantly, they are moving full speed ahead now, after breaking the seals of the enrichment facilities.