Stephen Gilbert MP said he "feared at worst" that the woman he helped rescue from the Thames was dead.
He said: "I feared at the worst it would be a body, I alerted the police, and they were called in to get a response, and then she moved, and I was able to chase down the terrace and grab one of the life-buoys, throw it in, made a reasonably good shot and she grabbed it."
He added, "I guess it's just the right time, right place and I was delighted to help.
More top news
Luke Castiglione has the full forecast. Showers drying up but further rain on the way....
Friends remember "amazing" Adam Pritchard, who died after apparently plunging down down a sharp drop while cycling with his sister.
Rain and the ensuing mud hasn't stopped thousands of people enjoying Glastonbury festival