Aw, I'm sorry @Welcometomyhouse. Genuinely.
Unlike a lot of MN, I live in a leasehold flat right now and it's been great - our freeholder is quite hands-off, our ground rent is low, and our service charges are reasonable. Maintenance can be a bit slow, but it's done to a good standard, and affordable. Everyone who lives here knows each other and we all get a say.
But we're in the middle of selling, and it's been a complete pain, because leaseholds are getting harder... thankfully we're not affected by the cladding issues, but could be by the new fire safety regulations that are in draft right now, and everyone is more cautious around leaseholds anyway...
If it was just the management committee that's disappeared, that'd be one thing - and I'd still be advising to run for it, because you'd have no power to do anything yourself, and no legal entity to do it for you.
But no freeholder too? Someone owns the freehold. If the company is gone, it'll revert to the Crown, I believe.
There are leasehold reforms planned, but they've been very slow moving, and there's no guarantee that they'll pass. If they do, it seems very unlikely that they'd apply to existing leaseholds, so it wouldn't help your situation (or effect mine). It may just mean that there's an even smaller market for people willing to consider an "old-style" leasehold, if it ever happens.
Your post suggests this is the only affordable option right now? If that's the case, I think it's now clear why, sadly. And it seems that the vendor's solicitor is aware that they won't be able to provide any of the required information, so is offering what they do have on a "take it or leave it" basis, in the hope that someone will take it...
If you have really deep pockets, you could potentially research if the freehold has gone to the Crown, and if so, what the costs would be to take it to Tribunal and get a cost for owning the leasehold yourself - but you'd be looking at a lot of money. There was an article in a finance column last week which advised someone who did have a freeholder but wanted to buy the freehold to prepare to spend about £32k on the freehold, plus about £8k on costs. It will be dependent on area, and length of time left on the lease, but it's not cheap... and when you go under 80 years left on the lease, 85 for some banks, it's not mortgageable.
Is moving further out an option, for cheaper housing?
I do appreciate the heartache, honestly. It's soul-destroying getting so far down the line for it to fall apart outside of your control. Our buyer is currently struggling with their mortgage... I'm so sad that it's all falling apart, I was mentally living in the house we were buying, even though I tried not to. It's normal, and it will pass, and there will be other flats (that are much safer investments for you!) 