Buying houses with no deed.

I was casually browsing bazaraki and I found a couple of houses waaaay cheap. They both say "No title deed."

I have questions.

What does that really mean? Is it too dodgy?

Can I get the title if I wanted to or is it a done deal?

Does it mean they are illegal?

Isn't the deed the receipt of purchasing the house?

Ref:

https://www.bazaraki.com/adv/5568951_3-bedroom-semi-detached-for-sale/

https://www.bazaraki.com/adv/5568941_3-bedroom-villa-for-sale/