Established in 1981 we are South Yorkshire’s premier competitive swimming club and train at the prestigious Ponds Forge International Sports Centre in Sheffield. Our aim is to compete at the highest levels in the sport, and within our squads we have many International swimmers and National medallists. We also compete at district, county and regional levels, including various open meets through-out the year. We are regularly ranked in the top 10 clubs in Great Britain.
For any training related enquiries please email by clicking this link. Any enquiries about COSSS Open Meets should be directed to our Gala Secretary by clicking this link. For any general enquiries or correspondence please email our Honorary Secretary, Sarah Finlay, by clicking this link, or for written correspondence, send to:- COSSS Honorary Secretary, Ponds Forge ISC, Sheaf Street, Sheffield, S1 2BP. Many of the photos on our site are courtesy of Simon Wright at GBswimstars, see more of his work at www.gbswimstars.com
Exciting racing at White Rose!
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- Last Updated on Monday, 17 July 2017 16:49
Our mini Teamsteelers competed in two teams at the annual White Rose competition on the 8th July. This formed the Yorkshire round of the Arena Junior Inter-league competition.
Top competition at French Open Champs
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- Last Updated on Wednesday, 12 July 2017 11:50
COSSS swimmers from Senior Elite and AGN travelled to the French Open National Championships in Chartres for a tough weekend of international swimming.
Lily wins bronze at European Juniors
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- Last Updated on Monday, 03 July 2017 22:47
Congratulations to AGN swimmer, Lily Boseley, for winning bronze in the 4x100 mixed medley relay team at the LEN European Junior Championships in Netanya, Israel
COSSS in the medals in Leeds
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- Last Updated on Wednesday, 28 June 2017 23:17
JO3, JO2, JO1 and Regional Squad competed at the short course Leeds Summer Meet over the weekend of the 24th/25th June. It provided the opportunity for late season short course racing with many of our swimmers posting new PBs and resulted in them winning a large number for medals.
Little Olympics Results
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- Last Updated on Thursday, 22 June 2017 14:17
The results for the Little Olympics Gala held at Ponds Forge on June 18th are now available here.
White Rose Teams
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- Last Updated on Tuesday, 13 June 2017 12:16
The swimmers selected for the White Rose League Gala to be held on Saturday July 8th at John Charles Centre in Leeds are now available here.
Farewell to Mike!
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- Last Updated on Tuesday, 06 June 2017 14:39
Farewell to coach Mike Taylor, who leaves the club today. Mike has been one of our key coaches for nearly 10 years and has had a massive impact at all levels of the club - from Swimstars and JO3 to our more senior swimmers in AGN and Senior Elite.
Age Group and Youth/Senior NERs
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- Last Updated on Thursday, 01 June 2017 21:12
This year the NER long course Championships were compressed into two long weekends in Sunderland. Due to meet congestions, most AGN and Senior Elite only competed in the relays, but JO1 and Regional Squad swimmers performed well to secure a large number of medals and many other finals places.
No Frills Gala Underwater Photos for Sale
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- Last Updated on Wednesday, 24 May 2017 18:31
Renowned aquatics photographer Simon Wright of GBswimstars kindly offered to take some underwater shots during Session 1 of our No Frills gala held over the weekend of May 13th and 14th. Head over to the Photo Gallery to view the images and if you would like to purchase an image, priced at £6 for one or £10 for two, then send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. with your details and the relevant image number(s) and we will arrange to send the image(s) to your email address as a high quality JPEG image.
