Brewdog co-founder and chief executive James Watt has promised staff a wide-ranging independent review after a group of ex-employees complained of a toxic culture that left a “substantial” number with mental illness.

In an email to colleagues, a week after the allegations surfaced, James Watt apologised for a series of mistakes that prompted the open letter, saying it was “100% my fault”.

One former worker who spoke to Sky News said working at the company could be “horrific”.

Good morning everyone.

We would like to share the following statement made by James this morning on the EFP forum, which we sincerely hope to be genuine, and not further spin and PR. pic.twitter.com/S9G682Vxf5

The 61 signatories to the letter, calling themselves Punks with Purpose, placed the letter on Twitter and described the craft beer specialist’s atmosphere, since its inception in 2007, as being built around a “culture of personality”.

It accused the business of being relentless, uncaring, publicity hungry and of telling “lies” to drive awareness of the Punk IPA producer’s rapid expansion from brewer to bar ownership.

Sky News has subsequently spoken anonymously to a former Brewdog employee – who worked for the company for three years – about her experience.

She said: “It was fast paced, yes, it was highly engaging, yes and that’s why we all joined.

“But there was an element of if you don’t toe the company line, you’re out.

“If you challenge something that James or one of his senior leaders he respects says, you’re not going to have a good time.

“I think that was an experience for a lot of people that had signed the letter… it was really good and it was a really enjoyable place to work – until it wasn’t.

“And when it wasn’t, it was horrific.”

Mr Watt told staff on Thursday: “In the hard and fast environment of high growth, I have all too often neglected many important people elements of our business.”

The Brewdog boss pledged to “throw my heart and soul” into changes to make Brewdog a better employer, including through a new employee representative group and career development.

He said the independent review would include anonymous contributions from both present and past employees, with the results to be shared internally and externally.

Mr Watt also admitted there were parts of the business where it was too “lean” and a separate structure review would examine this.

A salary review – delayed in January – was to take place in July, he added.

“These are just the first steps and we’ll keep you updated with further actions that result from this listening and learning phase,” Mr Watt continued.

“Although this situation hurts a lot, I am determined to ensure that we use it as a catalyst to become a better business”.

Punks with Purpose used its Twitter account to welcome the statement and hoped it was not “further spin and PR”.

Related posts:

Sunak to hail reforms aimed at luring tech giants Lloyds chief has his work cut out as he prepares for one of banking’s toughest jobs Amazon boss (and world’s richest man) Bezos backs tax hike after Biden criticism HSBC could move more than 1,200 staff to permanent work-from-home contracts Pound strengthened after weekend election results AstraZeneca staves off shareholder rebellion aimed at curbing pay-outs Locked-down UK economy shrank by 1.5% in first quarter Premier League extends £5.1bn TV broadcast rights deal to 2025 Boots puts for sale sign above Aromatherapy Associates Fund manager Jupiter hires bankers to draw up £1.5bn bid defence plan Energy funding, Octopus investment and Purplebricks ‘blunder’ WH Smith faces investor pay revolt amid cost-of-living crisis