Ms Miller told the Evening Standard that she could not remember how she came to be under the cab and that her recollection of the accident and having the vehicle lifted off her was "a bit hazy at the moment".
"There's just no words to thank them, I'm so immensely grateful," she said.
"It just proved that Londoners are some of the greatest people on Earth, I'm just so grateful for their help."
Ms Miller was admitted as a barrister and solicitor of the High Court of New Zealand in 1995, before being called to the bar in England and Wales in 2008.
Eyewitness Laura Fares told the Daily Telegraph she called for bystanders to help lift the taxi.
"I was really bossy, but I think people needed to be told what to do. I started yelling at people in the street, running up to them, especially men. I was saying 'You're a man, there's a lady under the car you've got to help push'.
"It was mostly men in suits - dropping their brief cases to run and help. There were about 25 of us. We did it in about three minutes.
"She was very pale, but still blinking. I knew she was alive.
"When I got back to the office I was shaking and crying because I was so moved by the whole thing.
"I am so glad she was alright. The emergency services and crews arrived about five to ten minutes after we freed her."
Ms Miller has worked for Beale and Company in London since 2010.
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