While many Island Championships meet records tumbled to the young prospects competing at St Sampson’s High, 15-year-old Tostevin instead rose to the challenge of representing Millfield School in the Millfield and Street Super Series.
In an event coinciding with the opening of the ‘Nationals’ qualification window, she raced six disciplines in her age group and won her favourite three – the 50m, 100m and 200m backstroke.
Her 2min. 19.76sec. clocking over the 200m distance was 2.5sec. inside her own island long-course record from last year’s British Championships.
She is currently fourth in the event’s British age-group rankings for 2019 and eighth over the last 12 months.
Tostevin also finished in bronze-medal position in the 50 and 100 freestyle and sixth overall in the 50 butterfly, clocking a 30.32 PB in the latter.