Representing Shaftesbury Barnet in Division One of the UK Women's League, she clocked 13.55sec. to win and finish well inside her previous legal best, a time of 13.68 set six years ago.
'It's a really good stepping stone going into next week's race in Donnas in Italy,' she said afterwards.
Robilliard's one quicker time was a wind-assisted 13.41sec.