LONDON/SYDNEY (Reuters) – Western and Middle East insurance specialists see Iran as an appealing $8 billion (£5 billion) market in the wake of its nuclear deal with world powers, though uncertainty over when sanctions on Tehran will be lifted means they are treating the country with caution. Eight out of 11 insurance and reinsurance specialists who responded to questions emailed by Reuters this week said Iran was an attractive or very attractive market, especially in the marine and energy sectors.