Mrs Durber sued PPB Entertainment Limited, which trades as Paddy Power and Betfair, for breach of contract and for the rest of her winnings, based on what she was shown on screen.

In a judgment on Wednesday, Mr Justice Ritchie granted summary judgment in her favour, meaning she won her case without a trial.

He said: “When a trader puts all the risk on a consumer for its own recklessness, negligence, errors, inadequate digital services and inadequate testing, that appears onerous to me.”

Speaking to ITV news, Mrs Durber said the money would be lifechanging for her family.

“Obviously it will look after the children, from that we’ll pay their mortgages and we’re going to enjoy our retirement,” she said.