In July, she won the AAA Championships title in 2:00.58, ahead of Anne Purvis and Christina Boxer.
Bailey was the UK's second fastest 800m woman for the next four seasons, behind Lorraine Baker (1984/86) and Kirsty Wade (1985/87).
On 11 September, she finished third in the IAAF Grand Prix Final in Brussels, behind Ana Quirot and Slobadanka Colovic.
Then on 15 September in Lausanne, she reached her peak at 800 metres, running 1:58.97, to set a new English national record.
The UK record was held by the Scottish born Welsh athlete Kirsty Wade, with 1:57.42.
She did earn selection for the 1990 Commonwealth Games in Auckland, where she finished eighth in the 1500 metres final in 4:13.31.