Iran has at least 15 operational fission-based nuclear devices, with plutonium cores.

ACCORDING TO SOME OF MY SOURCES-more than one.

Just re -confirmed.

Chatham House Rules.

The only problem Harold is that Netanyahu may not have been briefed that 

Iran already HAS nuclear weapons, using French supplied plutonium.  

You may quote 

My sources remain confidential, but they are highly-placed.  

Iran has at least 15 operational fission-based nuclear devices, with plutonium cores.  

The enriched uranium programme is a blind, ie a deception tactic.  

CIA and MI6 are aware, but each is anxious not to upset Teheran, Paris or Berlin.     

Any Israeli attack on Iran has to be limited to conventional weapons, which may not be sufficient, ie there ought to be a ground war, which is beyond the capabilities of Israel acting alone, nor should she have to act alone - other Western powers should be doing their bit to contain Iran.