"We understood the place names Judean Desert and Samaria were not currently legally recognised"
Is that a sensible declaration? Is the British government of a EU body competent to recognize such?
Then ask yourselves why then is it not legal when even the UN employed those terms in 1947:
The boundary of the hill country of Samaria and Judea starts on the Jordan River at the Wadi Malih south-east of Beisan and runs due west to meet the Beisan-Jericho road and then follows the western side of that road in a north-westerly direction to the junction of the boundaries of the Sub-Districts of Beisan, Nablus, and Jenin. From that point it follows the Nablus-Jenin sub-District boundary westwards for a distance of about three kilometres and then turns north-westwards, passing to the east of the built-up areas of the villages of Jalbun and Faqqu'a, to the boundary of the Sub-Districts of Jenin and Beisan at a point northeast of Nuris. Thence it proceeds first northwestwards to a point due north of the built-up area of Zie'in and then westwards to the Afula-Jenin railway, thence north-westwards along the District boundary line to the point of intersection on the Hejaz railway. From here the boundary runs southwestwards, including the built-up area and some of the land of the village of Kh. Lid in the Arab State to cross the Haifa-Jenin road at a point on the district boundary between Haifa and Samaria west of El- Mansi. It follows this boundary to the southernmost point of the village of El-Buteimat. From here it follows the northern and eastern boundaries of the village of Ar'ara rejoining the Haifa-Samaria district boundary at Wadi 'Ara, and thence proceeding south-south-westwards in an approximately straight line joining up with the western boundary of Qaqun to a point east of the railway line on the eastern boundary of Qaqun village.