Israel and Saudi Arabia together against Iran?

F-15 Strike Eagle

The Sunday Times reports:
ONCE they were sworn enemies. Now Israel’s Mossad intelligence agency is working with Saudi officials on contingency plans for a possible attack on Iran if its nuclear programme is not significantly curbed in a deal that could be signed in Geneva this week.
Both the Israeli and Saudi governments are convinced that the international talks to place limits on Tehran’s military nuclear development amount to appeasement and will do little to slow its development of a nuclear warhead.
As part of the growing co-operation, Riyadh is understood already to have given the go-ahead for Israeli planes to use its airspace in the event of an attack on Iran. (For more details see also Haaretz)
(I have to add that the question Iran is not the only thing whereupon the views of the two countries converge. Think about the possible emergence of a Palestinian state. Or demcoracy in the Arab world, for that matter... )

According to Marsha Cohen (Lobelog) the Sunday Times ....
.. has once again recycled its periodic claim that Israel and Saudi Arabia are about to join forces for an attack on Iran. According to Uzi Mahnaimi, Israel’s external intelligence service, the Mossad, is formulating contingency plans with Saudi officials if Iran’s nuclear program “is not significantly curbed” in the agreement that may be signed this week in Geneva.  
Mahnaimi produced simailar scoops in 2009 and 2010, she says.