The campaign is backed by Stephen Fry and Alistair Campbell and items will be sent to around 35,000 people.

Items include an A5 case-study of one sufferer, an A4 letter on Mind Week from the charity's chief executive and a donation form.

"Our case study subject ‘Steve' writes about his problems accepting his diagnosis, how unhelpful his work were and ultimately how Mind and his local Mind association were able to support and help him," said Yvonne Crossley of Mind's direct marketing team.

A copy of the Mind Week report has also been included for high-value donors.

A follow up reminder will be sent out to non-respondents five weeks after the initial campaign.

"The reminder will re-iterate how important this issue is and feature an update on events that took place during Mind Week," said Crossley.

The campaigns have been produced in-house by the charity's DM team in a bid to curb costs and will be printed by PFC.

The campaign is linked to the charity's website, which features additional case studies.