And fellow Spartan Peter Irving, who has been out of action for six weeks with a pulled hamstring, was delighted with his gold medal in the 4x400m relay and by reaching the final of the 400m hurdles on Sunday, when he finished fifth.
Thérin, with a previous javelin PB of 50.97m, also set at Bedford, set a new mark of 52.09m on Saturday to break her Island record.
The girl behind her in second place had to be content with a throw around 49m.
‘I think the record came on my third throw,’ said the 21-year-old last night, ‘although I was in agony immediately afterward,’ adding that it was probably tendonitis.
‘My elbow’s really painful at the moment and the injury couldn’t have come at a worst time in the season.
But everything was right for me on Saturday, and I love throwing at Bedford.
I also finished second in the discus on Sunday, with 47.24m and fourth today, by about a centimetre, in the shot, with 12.55.
‘For the last week I’ve borrowed a new javelin, which I’ve really enjoyed throwing, although at £477 I can’t afford to buy one at the moment .
.’ Thérin’s throw in the discus also lowered her Island record and she now hopes to be picked for England in her next event at the Loughborough International in two week’s time.
Meanwhile, next weekend both Phelan and Irving will be competing in the Hampshire Senior County Championships at Portsmouth.
‘In the men’s event UWIC (the University of Wales Institute, Cardiff) came third and the women’s team second,’ said Irving – both he and Thérin represent the sports based college.
Phelan, supported by ABN Amro, represented Bath and having won the high jump competition had the bar set at 2.20m – and so nearly cleared it.
As this was his first serious competition since giving the indoor season a miss after a knee injury eight months ago, the Islander was delighted by his performance and, after the NatWest Island Games in Rhodes, he hopes to be selected for the European U23 Championships in Hungary in July.
As for the Island Games? ‘I really think all three of us will do well, and hopefully will come back to the Island with medals,’ said Irving.
‘I really believe this could be a good summer for all three of us.’