Well, giving that the GBP against EUR rate is like 1:1.1 at the moment, even if you have 70k anual salary Berlin, it's much less than who paid 70K in Berin, considering the living cost. And 70K is very reasonable now with Senior title, not to mention manage positions.
Also note, 38K is for person with science/engineering background. Otherwise, lower limit for EU Bluecard is around 48K