Sunday, May 26, 2013
More than 130 people took part in the swim when some "got into trouble after suffering from the effects of hypothermia", according to the coastguard.
Dozens had to be pulled from the sea by lifeboats while others swam to the shore themselves. All were conscious and there have been no reported fatalities, according to a spokeswoman for the Maritime Coastguard Agency (MCA).
Two swimmers - including a woman from Kettering - who were reported missing earlier have since been found.
The MCA spokeswoman added it was unclear how the swimmers got into difficulty as the weather conditions were fine but the water was "very cold".