[3][7] In her first appearance at the British Championships in 2008 Frederiksen won two gold and two silver medals from her six events and set a number of national records.

[10] An in-competition drug test at the 2009 IPC Swimming European Championships found high levels of salbutamol in Frederiksen's bloodstream.

She received a 6 months doping ban, backdated to the day of the drug test, and had to forfeit the two medals she won later in the competition.

[14] In October 2012 Heather Frederiksen (and silver medallist Louise Watkin) left the city of Salford, according to BBC Sport, as a result of a breakdown in the relationship with coach John Stout.

[15] She was appointed Member of the Order of the British Empire (MBE) in the 2013 New Year Honours for services to swimming.