Midland Bank posted a healthy first-half profit.

The British banking firm, which recently completed its acquisition of San Francisco-based Crocker National Bank, reported a pretax profit of $213 million for the six months ended June 30. The figure compares to earnings of $99 million for the first half of 1984. Crocker made $18.2 million in this year’s first half, compared to 1984 losses of $115 million. Midland attributed the improved results to higher net interest income and substantial securities trading gains.