Were there any other nations which were interested in the Tornado apart from the countries which developed the plane and Saudi Arabia?
It turns out there was quite a bit of interest, that I didn't know about. Canada. Spain and Greece all liked the Tornado, but needed a true multi-role aircraft so bought other types instead. Interestingly, the original NATO F-104 replacement studies had included Canada, Belgium and the Netherlands, so with an early enough PoD it's easy enough to see all three getting the type.
The Middle East was fairly active for Tornado. Turkey placed an order for 40 in 1984, but the export credit wasn't approved and the deal fell through. Iraq was actually very interested, having evaluated the type in 1982 and anticiapated an order of 100 aircraft; the Iran-Iraq war put paid to that. Jordan and Oman were both interested, Oman actually placing an order, but only for small numbers.
In the Far East, South Korea had a requirement for 50, 40 of which to be a specialist SEAD type, and Malaysia actually ordered 12 including 4 SEAD versions - this was later recast as an order for Hawks. The SEAD type in question was to be a GR.1 with Marconi electronics, as opposed to the German ECR version. Japan considered the Tornado for the requirement that led to the F-2, and it was quite well regarded by JASDF officers.
Gazing into the crystal ball, with a 'late' PoD I would expect the Iraqi order to go through, whilst the Jordanian interest is converted into F-15s (they were to have been supplied through Saudi Arabia). The Iraqi interest is particularly significant as it's similar in size to the OTL Saudi order, and clearly threatens both Iran and Israel. This probably sees Iran looking for a long-range strike aircraft of its' own, I like the F-111 but the F-15E is more likely.
Would an alternative to Bae be a bigger focus on Airbus and Regional Jets?
This wouldn't be a bad idea, whether or not the military aviation side is doing well. There again, it would've been in OTL, and BAe didn't really do very well.
I see then you see no prospect in Iran buyinf British jets.
It was Iranian policy under Mohammed Reza Shah to equip the IIAF with American aircraft and train it along USAF lines. Once he dies, this stance may weaken, but it was taken for sound military reasons and I can see a strong preference for US fast jets at least. British, or other nations, aircraft would only really get a look-in if they offered something that the Americans couldn't match.
Iran still kept the order until the Revolution, the only nation apart from Britain and France to do so.
Very interesting...
Which Civil War in Yemen (there have been several) and how close were they to Oman until 1979, I say this because both of them can control access to the Gulf.
I'm thinking of Iranian support to the North in 1994. This would offset the Wahhabi support, weakening their influence in Yemen and increasing that of Iran, probably removing the grievances behind the current Houthi (Shia) insurgency. On the other hand, it would increase discontent amongst the Wahhabi community. I think this is the community responsible for OTL's al-Qaeda in the Arabian Peninsula, but trying to make sense of who is behind which of Yemen's several ongoing insurgencies is giving me a headache.
Iraq would likely be another flashpoint for Iran as well which the Saudis would not be happy anout.
Only if Saddam, or his successors, are foolish enough to invade Iraq. Admittedly that can't be ruled out, especially considering his probable successors. The way I see it is that Iran, Iraq and Saudi Arabia are three contenders for control of the Persian Gulf. At first, they're fairly even, and jockeying for position amongst them will see two of them aligning against the third. As Iran gains in power and influence, the Iraq-Saudi Arabia axis will have its' superiority eroded away until Iran eventually overtakes even the combination.
This, together with potentially closer Saudi-Pakistani relations and the Soviet Union to their north, will make Iran feel encircled. They've got their outlets through the Arabian Sea, though that threatened by the Muslim nations, and through Turkey. Expect to see the Turkish border crossings improved, and Iran prepared to close the Persian Gulf (they can use Arabian Sea ports) and contest control of the Arabian Sea.
Which the Americans would benefit from unless relations with them were strained over US-Iranian relations. Likewise would they be keen on a higher oil price than on OTL because if it does follow OTL prices then yes their economy will suffer badly.
Which would of course sour American-Saudi relations. Especially if the Iraqi-Saudi axis is able to dominate OPEC.
If Iran develops the bomb then I would expect the Saudis to be even more keen on the Pakistan nuclear programe. Which I would agree would cause a seperate Cold War between Saudi Arabia and Iran.
Thinking about this, Iran is militarily superior. It doesn't
need nuclear weapons. Of the three major Gulf powers, Saudi Arabia is weakest - they don't have the demographics or the economy to oppose Iran. If they're feeling threatened, nuclear weapons give them a deterrent against Iranian attack. Iraq of course had a nuclear progam in OTL, which worried both the Iranians and the Israelis.
On OTL's timescales, Iraq would probably get nuclear weapons in 1993 and Saudi Arabia (extrapolating from the Pakistani program) in 1998. No Iran-Iraq war probably moves the Iraqi program forward a few years. The Pakistani/Saudi program apparently had a deliverable weapon by 1987, hough the first test wasn't until 1998 in response to Indian tests.
With Saudi Arabia running scared of Iran, and them taking a more open involvement in the programme, that capability may be tested much earlier. The Iraqi program will be advanced by a few years, especially with them increasingly aligned to Saudi Arabia and possibly sharing knowledge. Iranian nuclear weapons will probably be a response to the Arab nations.
I'd expect all three nations to have nuclear weapons by the start of the 1990s. Syria won't be far behind, and the Non-Proliferation Treaty will probably start falling apart at this point. Israel may be playing whack-a-mole with nuclear weapons facilities in the Arab states.
Of course the close Israeli-Iranian relationship would continue to endure for quite some some.
Who will the Shia's of Lebanon turn to if Iran does not back them or decides to do other actions to avoid alenating Israel? (Syria perhaps?) Would this also mean there is no close Syrian-Iranian relationship either?
Israel and Syria are both natural allies of Iran, with similar strategic interests and few areas of conflict. I'd envisage Israel pushing ballistic missile defence harder than OTL, and probably sharing the fruits of that work with Iran. Possibly also the Jericho missile, and even space launch capabilities. The Israelis will still want sovereign capability, but Iran has better geography.
Lebanon will play out totally differently. With an early enough PoD, Iran supports the Lebanese Armed Forces in the Lebanese Civil War, possibly intervening directly to aid in keeping the peace. This avoids the Israeli invasion of 1982 altogether, no Hezbollah, no tying up of Lebanon and the West Bank. The Palestinians get expelled from their third country, goodness only knows who'll have them after they've brought strife to Israel, Jordan and Lebanon. The Syrian occupation of Lebanon is replaced by an Iranian one.
If later, they at least don't support the Shia community, which means a much weaker, maybe non-existent, Hezbollah. Probably still an Israeli invasion of southern Lebanon, but with Iran providing support. Lebanon is still unstable, but less threatening to Israel.
Perhaps the Iranians would want a naval base in Aden to deal with this threat.
Very probably; this would fit quite nicely with Iran's vision of succeeding the United Kingdom as the major power in the region too. If Iran has supported the Yemenis in their civil war, it should be easy to obtain rights for a naval base and an air base, possibly both at Aden.
Just without the obvious censorship
The film industry is going to be doing much better than it already is OTL?
It would appeal to me to make one of the first Iranian films to go big in the rest of the world to be an adaptation of
Lord of Light.