The Crown Prosecution Service has released a number of letters written years ago in support of Bishop Peter Ball. This is because of a Freedom of Information request by the Telegraph newspaper.
The released documents are here.
The Telegraph news report is here: Establishment figures who helped disgraced bishop avoid prosecution for sex abuse revealed
Another news report by the BBC is here: Letters of support for sex offender ex-bishop Peter Ball released
And the Guardian has this: Archbishop and MPs wrote in support of bishop later convicted of sexual offences
There is a press release from the Church of England which is available here: Statement on Peter Ball letters released under FOI