Flowers was the £132,000-a-year chairman of the 'ethical' Co-op Bank from 2010 until May this year when he stepped down as the bank's financial woes became apparent.
The bank lost £700 million in the first six months of this year.
In one text, Flowers wrote how his plans for a party were 'turning into a two day, drug fuelled gay orgy!!!
' In another, he boasted of how he was 'snorting some good stuff'.
That was sent on the day he was first scheduled to appear before the Commons committee, but the session ran out of time to hear him.