By Pete Whitfield, PA Sport

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Team England's medical chief has backed the decision not to punish sprinter Kim Collins following his positive drugs test.

The St Kitts & Nevis athlete won Commonwealth Games gold in the 100 metres but later tested positive for salbutamol, a drug used to treat the symptoms of asthma.

Collins - an asthmatic - was required to declare his use of the drug.

But Games bosses decided he had used salbutamol for legitimate medical reasons and his failure to declare the use was an administrative blunder.

And England chief medical advisor Dr Chris Jarvis backed that decision - insisting a ban on the use of the drug would prevent asthmatics competing.

He told the BBC: "The main aim of the regulations is to allow people who have disease to keep on competing - it's trying to create a level playing field.

"Many English and UK medallists have been asthmatic and I wouldn't want them to be removed from sport.

"On a personal basis this was probably a clerical error and it does seem very hard to remove a medal from an athlete for that."