Original sentence: The nominations of Prime Minister Boris Johnson for the House of Lords were selected based on their support for his version of Brexit, rather than ability or service to the public as is customary (for instance, the previous Speaker of the House of Commons John Bercow did not receive a nomination due to Johnson's perception that he worked against him for getting key Brexit votes through)
Edited sentence: The nominations of Prime Minister Boris Johnson for the House of Lords were selected based on their support for his version of Brexit, rather than ability or service to the public as is customary (for instance, the previous Speaker of the House of Commons John Bercow did not receive a nomination due to his inability to remain unbiased as his position demanded