Swim Bournemouth international Jay Lelliott’s hopes of an Olympic debut in Rio ended in heartbreak after illness forced him to pull out of the final of his best event at the British Championships.

The 21-year-old Bath University student looked in good form in his early events in Glasgow, winning bronze in the 400m freestyle and 200m butterfly in 3:47.68 and 1:58.32.

He then qualified fifth fastest for the 1500m freestyle final in 15:23.90 – only for a stomach bug to force his withdrawal 30 hours later.

Tim Shuttleworth of Loughborough University won the final in 14:55.23, just 3.5sec quicker than the Dorset record that Commonwealth Games finalist Lelliott set at the 2014 European Championships.

Swim Bournemouth head coach Emma Richards said: “Jay is devastated.”

Lelliott recovered sufficiently to post a respectable time of 1:49.28 in the next day’s heats of the 200m freestyle but against a world-class field led by world champion James Guy, he missed the final by three places.

Meanwhile Lelliott’s Dorset senior 100m butterfly record was one of four county standards to fall as Poole’s Jacob Peters made two junior podiums.

Peters, 15, had already broken his own Dorset junior record with a time of 55.59 in the 100m butterfly heats.

He improved again to 55.13 in the junior final, finishing second to South West rival Sam Dailley, also 15, of Plymouth Leander by just 0.05sec.

Both were inside the 15yrs British age group record.

Earlier Peters smashed the Dorset and South West junior records with a winning time of 2:03.41 in the 200m butterfly heats.

Peters, who came third in the junior final in 2:04.48, has now broken 39 Dorset records since last summer.

Team-mate Harriet Perfect, 15, twice came within 0.7sec of her Dorset records as she came fourth in a fiercely competitive 200m backstroke junior final in which 0.8sec covered places two to six.

Her times were 2:17.95 in the heat and 2:17.96 in the final.

She was 22nd in the junior 100m backstroke with a heat time of 1:05.07, just 0.1sec outside her Dorset senior and junior records.

Poole’s Fiona Hardie flew in from her university in the US to record a lifetime best time of 1:01.65 in the 100m butterfly, improving her ranking from 22nd to 16th.

Jasmine Holmes produced her second best-ever time of 2:07.92 to finish as the 23rd junior in the 200m freestyle.

• Swim Bournemouth new girl Savannah Barman returned to her native South Africa to win three youth medals at their Olympic trials – silver in the 400m and 800m freestyle and bronze in the 200m freestyle.

Barman, 17, who moved to the UK at the start of the year, also made her first senior final in the 200m butterfly, placing ninth in 2:26.59.

She also came 13th in the open semi-finals of the 200m freestyle.