This thread has moved away from discussing the UK1 factory, however, I’ll just add to the discussion on UK1 strategy.
I totally agree with Zhukov that Egypt is the most important target. However, depending on the remaining forces there are a lot of different options how to do it. Only if there are 4 (or more, with a bid) German units left I will not attack Egypt. If there are 3 Germans, I’d like to send everything possible, including the bomber and the cruiser support shot, sending the carrier to get the Jap transport and intending to land the planes in Ethiopia. Depending on German air presence and Russian unit allocation you may also be able to land in Trans-Jordan. Odds: about 71% to take with at least 1 inf, 19% to clear all land units and 10% to lose one or more air units. It is actually debatable whether you should press the attack with 1 fighter and 1 bomber versus 1 armor; you may lose the fighter but this will pay back by keeping Africa clear. On the other hand you may not be able to sink the German fleet next turn without the extra fig.
With 2 armor left you can consider using the bomber and/or cruiser for other purposes. 3 inf 1 fig versus 2 armor lets you take Egypt 68%, clears land units another 17% of the time and loses the fighter 15%. However these numbers also include the times when you continue with 1 fig against 1 arm and win, which you probably shouldn’t do, so you will sometimes retreat with 1 or even 2 armors left (and cry). Sending the bomber or the cruiser too makes it much better of course. By the way, I consider clearing all land units a good outcome, since it is really just about killing the German tanks. Taking Egypt is just a nice bonus that will prevent air units to land there.
With 1 armor left, you have options! Sending just the TJ inf and the fighter (possibly also the bomber) allows you to save the transport for future turns, but you need to send a ship against the Jap transport (likely the cruiser). You could also choose to send 3 inf and the cruiser against Egypt, allowing the fighter to take out the Jap tranny and to land in Buryatia (an advantage not to underestimate). I would love to send just 1 inf and bomber against Egypt, the fighter against the transport and preserve the entire Indian fleet, but this leaves no good landing spot for the bomber unless you positioned the Russians to assist in Trans Jordan.
Finally, the Aussie fleet moves depending on the Indian fleet. If the Indian fleet exposed itself to Japanese attacks, for example cruiser to SZ59 and transport to Egy SZ, you can be more liberal with the Aussia transport since it is less likely to get hit (and if it will, other battles will become less favorable for Japan). The sub can move freely but should always be positioned within 2 spaces of either Japan seazone or FIC seazone, threating the one the UK bomber can’t reach, so between the two of them you can take out any loose transports Japan leaves after J1 (or more likely, forces him to protect them).