We are considering UK rescues as well, the reasoning for our interest in the Romanian rescue is that most of the UK available are needing to be rehomed with an experienced owner, are not suitable to live with cats, etc.
The same is also true of the Romanian rescues too, even more so because they have had to live much closer to their instincts than most UK dogs ever have had to do - most Romanian rescues are street dogs in the truest sense, they've survived using fear, aggression, predatory skills and instincts and they've got used to life 'in the wild (city). Then they are caught, have needles stuck in them, operations on their genitals or major abdominal surgery, then transported hundreds of miles, quite likely kenneled at some point, and put into a strange environment with people they don't know and kept caged (even free roam of a big house and garden is going to feel like a cage to a street dog. They're the most likely type of dog to be missing in the UK because they don't want to live with humans, and will escape by any means, so many end up back on the streets but this time unfamiliar streets. They're also the most likely cohort of dogs to need specialist behaviourist help because they come with Baggage with a capital B. They've likely been scared, kicked or worse by humans pre-rescue and the whole catching them to rescue is traumatic for them. You also don't get to know a dog for the first few weeks/months. They're in survival mode, one strategy is which is appeasement. The dog in the rescue seems laid back and half to be around people, you get it home and either that change is the straw that breaks the camel's back and the dog turns on you, or they carry on appeasing until they relax enough to be themselves and their real personality turns out to be nothing like you thought it was.
We are open to rehoming a suitable adult but most of the dogs in the UK that would be appropriate for us go very quickly.
I hear you. I do, I was in a similar boat but with much more experience and I still would have had to compete to get a suitable dog. The thing is that Romanian (or any of the other imported rescue dogs) really are not suitable for first time owners. I'm a 6th time owner with a degree in animal behaviour and I would think twice about a Romanian rescue dog. They really are not suitable for first time owners and I'd be very suspicious of any rescue organisation who said otherwise.
Which leads me on to the next point- there are some seriously unscrupulous people around importing dogs. One of mine is allegedly a Spanish street dog. I didn't get her from the importing organisation (I don't support the concept) but rehomed her from an unsuccessful adoption. She's got a botched spay job (the charity did that) so her abdominal muscles are f'd and had a questionable test result for a disease that is devastating and not native to the uk (hidden from adopters). She is most likely a dog who was bred to import under the guise of rescue, and her adopters took her to be put to sleep after 2 weeks because they could see how bad the "rescue" was and didn't want to return her. They should never have passed a rescue organisation's checks. TLDR; rescue organisations who import dogs are often unscrupulous, and puppies and young dogs in particular may well have been puppy farmed in atrocious conditions, gone through bad surgery and have health conditions either not diagnosed or deliberately hidden to import under the guise of rescue.
You could find yourselves a nice UK based rehome by putting out the word to vets (who often quietly do a lot of rescue and rehoming of healthy dogs brought in to be PTS for no reason to do with the dog), friends and advertise in spaces where it's allowed. Breed-specific rescues are also often a better bet than Dogs Trust etc in terms of availability and matching dog to home. There are several labrador breed rescues in the uk for example.