The UK's HM Treasury has updated their existing FAQs on doing business with Iran. Amongst these FAQs is guidance on whether UK firms can sign MoUs/conditional contracts before Implementation Day that are executed only after Implementation Day. For the FAQs, updated on 30 December 2015, please see: https://www.gov.uk/government/publications/doing-business-with-iran/frequently-asked-questions-on-doing-business-with-iran