Gandy began concentrating on the 800m, running 2:03.54 on 23 August 1987. She defeated Janet Bell to win the 1988 AAA Indoor 800m title in 2:05.62, and went on to reach the semifinals of the European Indoor Championships in Budapest, running 2:04.50. Three months later, she finished third at the 1988 UK Championships behind Christina Cahill and Kirsty Wade, running 2:03.69. By now a member of Hounslow AC, her lifetime best of 2:01.87 set on 19 June at the GBR v France v Soviet Union international in Portsmouth, would stand as the club record until broken by Shelayna Oskan-Clarke in 2015. In August 1988, she finished fifth at the AAA Championships/Olympic trials.