Complex sentence: This was not an immediate option because the Whig party was in opposition, but in the summer of 1827 Henry Brougham promised Hogg a future position as a professor of civil law at the newly created University College London.
Split into simpler sentences: This was not an immediate option because the Whig party was in opposition. In the summer of 1827, Henry Brougham promised Hogg a future position as a professor of civil law at the newly created University College London.