Advice needed regarding car failing its MOT please

[SequinsandStiIettos]

Afternoon,

I have a car - 30k miles on the clock - battery was flat earlier in the year and needed jump starting. A few weeks later, the airbag light came on and could neither be reset by the local garage nor the dealership.
Was told nearly 3 months ago needed a new airbag ECU (electronics).
Dealership have on order from Korea but none have arrived.
Other parts have been on order since May allegedly, also not arrived.
No ECUs available in the UK for this make of car, according to the dealership and they will not fit a second-hand one, even if I were to find one.
So car's MOT booked shortly has to be cancelled as it will fail. It is due start of November.
My questions:

1. Can a car without MOT sit parked on the roadside next to my house with no issues?
2. Can I transfer my current insurance and green flag to another car?
3. If the ECU ever does arrive, how can I drive my car to the workshop if no MOT or do I take my chances? Would the dealership store my car until the part arrives and how much do you think that would cost?
4. Should I part exchange my car without a new ECU/due to fail its MOT to the dealership or local garage or private sale, or would you hang tight?
5. Would you go onto using the bus in the meantime (might be doable but going to cause stress because single mum/swim with my two/have to be at work at 8.15/would need all shopping with slots) or use a hire car or buy a second, cheap run around to tide me over (if cheap, might have a myriad of problems)
6. How long can a car go unused without battery going flat?

What would you do Jodie Picoult?!

Thanks in advance

@SequinsandStiIettos

I considered asking third mechanic to disable the warning light but then I read that it would fail the MOT automatically for not flashing once as you put the key in. The actual airbag is fine according to local garage but they would still have to fail it because of the warning light - they also know of the issue so if it is disabled they will know why. Unless I take it somewhere decidedly dodgy from back in the day, but as I have kids I do actually want a legal MOT. Dammit Janet.

What a nightmare

And. A small mileage on the car??

I feel your pain

A car park is private land, but I can't think many would sell you a long term space with the knowledge that your car cannot be easily moved. A private garage or space is a better idea.
However as @waltzingparrot and @clockover say you can get this fixed. The dealership may be making a meal of it. Try an electrical specialist as suggested. One managed to fix my mum's car which kept earthing and getting a flat battery. I think you should give it two weeks of trying to sort it with other options before finding the medium term parking (which I'm sure you can find somewhere)

Worth having a look at this thread. Sounds a lot like yours. .www.kiaownersclub.co.uk/threads/airbag-light.51587/

@SequinsandStiIettos is the garage you use for MOTs the same one for repairs?

If so once it fails they cannot allow you to drive it away. If you’ve booked the repair with them and they can’t source the pay it becomes their issue I would think re keeping it until they do.

Doesn’t solve your getting around problem but may solve where the car goes. Until MOT date it’s fine to use.

@NavigatingAdolescence some of us don't do a lot of mileage! Mine is 8 years old with about 40k on it but it couldn't be maintained any better. It has fuel treatments to clean the injectors, engine flushes, regular services etc etc

You need a friendly slightly dodgy mechanic to remove the bulb. This may have once got me 6 more years driving a car. May have.