Complex sentence: After four successive defeats and conceding 12 goals, Bonham helped Arlesey to three league wins in a row in December and at the end of the month, his loan was extended until the end of the 2013--14 season.
Split into simpler sentences: After four successive defeats and conceding 12 goals, Bonham helped Arlesey to three league wins in a row in December. On 31 December, Bonham's loan was extended until the end of the 2013--14 season.