Complex sentence: He also wrote a number of articles for the early issues of "Socialist Review" but when his job took him to Scotland in 1954/5 he seems to have dropped out of the group, although he remained politically active in the National Union of Teachers and elsewhere.
Split into simpler sentences: He also wrote a number of articles for the early issues of "Socialist Review". After his job took him to Scotland in 1954/55 he effectively dropped out of the group, although he remained politically active in the National Union of Teachers and elsewhere.