The struggling retailer is also re-employing Mark Newton-Jones as chief executive, just a month after he left the firm.
He will head up a company voluntary arrangement (CVA) which will see the chain close as many as 50 stores, putting hundreds of jobs at risk.
Mr Brake said there were 53 agreements, including those formerly known as compromise agreements, with employees between 2013 and 2017 - with confidentiality clauses included in "all or nearly all" of them.
The man that had been brought in to replace him, David Wood, will now become managing director.
In a statement earlier this week, the retailer said: "Mothercare announces that it is now finalising a comprehensive restructuring and refinancing package to put the business on a stable and sustainable financial footing".
"We are in the final stages of detailing these restructuring plans alongside new committed debt facilities, an underwritten equity issue and access to other sources of capital which we intend to announce with our final results".
Chairman Clive Whiley said: "The recent financial performance of the business, impacted in particular by a large number of legacy loss-making stores within the United Kingdom estate, has resulted in an unsustainable situation for the Mothercare brand, meaning the group was in clear need of an appropriate resolution".
They have also had to contend with surging wage costs and eye-watering business rate hikes.