
The North Face
Wawona 6
Spacious vestibule, strong in storms, but rainfly tricky solo.

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I've just returned from 3 days in Dartmoor using a Lanshan 2. Was very windy but I had no problems with stability or condensation. I've modified mine a bit with extra guys and bungee cord though after a disastrous night in the Brecons. See longsufferinghiker on YouTube for a good overview of the tent and sensible mods.
Whatever size you think is appropriate for the amount of kit you take. I used to hike super light in the past with minimal comfort, usually a tarp and groundsheet. These days I would rather slow down a bit on the hiking and carry a bit more weight so I have a more comfortable camp. As my mate says "I like the walking but I DO like the stopping" Whatever size you decide, I would really recommend a 2 door design. I've just started using the Lanshan 2 and for the weight it's really spacious. It was tested by the weather on it's first outing and failed spectacularly so I've modified it a bit and it seems pretty stable since.
Lanshan 2 is viable for 2 people, but it depends how much you value space. It's possible to both sleep in there, and store your gear in the vestibules (you get 1 each!). Unfortunately there aren't as many 3 person UL options out there, and they are often on the more expensive side as they usually come from larger companies like Big Sky, MSR etc. I would check out Naturehike tents. They won't be the lightest (arguably not UL), but they have a few 3 person options if I remember correctly. Sensibly priced and some are lightweight enough to be comfortable.
Have a lanshan 2, it's great. Works fine. Only issue I've had is getting enough tension in soft ground with the supplied pegs. But easy solution bigger pegs.
If you are not set on freestanding, there is always the 3F UL Gear Lanshan 1 or 1 Pro. Lighter and better than anything else in the category under 300€. I love [my 2P ](https://imgur.com/a/CV8BqzE) and cannot recommend enough. Over 300€, the Durston X-Mid 1 would be a great choice. Both brands ship internationally. I also noticed that you mention the warmth of your previous tent. Tents in general don't usually add a lot of warmth, your sleep system should do that. Make sure that your sleeping pad has a good R-Value and your sleeping bag/quilt is Comfort rated for the temps you are expecting. A lot of manufacturers use the Limit or Extreme ratings for marketing purposes or don't get their pads ASTM certified.
I live in a similar climate and use the regular Lanshan 2. It works well, especially for the price. I recommend against the 4 season - it'll be too hot for most situations. The choice between the regular and the pro just depends on how much you value weight savings. In a humid climate you're going to be dealing with more condensation. The double wall of the regular lanshan helps manage that. The pro will handle it less well, but you save some weight as a tradeoff.
I have the lanshan 2, regular version, and I live on the west coast of BC in Canada and am regularly tenting where it is raining all night every night. I've been through a typhoon in that tent and it did great. I've used it maybe 400 nights total and it has no issues and has never leaked. I would definitely follow the advice others gave you and not get a single wall for a super wet environment. Especially a tent as small as the Lanshan 1. I think you and your stuff will get damp every morning. The double wall has done right by me, though.

The North Face
Wawona 6
Spacious vestibule, strong in storms, but rainfly tricky solo.

Gazelle Tents
T4 Hub Tent Series
Fastest setup, durable, but bulky and awkward door.

Durston
X-Mid 2
Ultralight, spacious 2P, but not for very strong winds.

Durston
X-Mid 1
Budget ultralight 1P, spacious, but large footprint.

Naturehike
Mongar 2 Backpack Tent (Nylon)
Budget 2P, spacious for price, but not for 4 seasons.

Ranked #1
Durston - X-Mid 2

Ranked #1
Gazelle Tents - T4 Hub Tent Series

Ranked #1
Gazelle Tents - T4 Hub Tent Series

Ranked #1
Durston - X-Mid 2

Ranked #1
The North Face - Wawona 6

Ranked #1
SlingFin - Portal 2