CLEAN : Britains Hague says Iran talks historic op

The transcript discusses the UK's position on a potential deal involving Middle Eastern countries, emphasizing the narrow differences between parties and the historic opportunity to curb nuclear proliferation. It highlights the importance of substance and detail in any agreement and the ongoing efforts to reach a consensus.

What does the speaker believe is necessary to breach the differences between the parties?

What is emphasized as important in any agreement discussed in the text?