Since the high-water mark of the last council elections the Lib Dems have lost overall control of the CornwallCounty Council, and have not won any of six local by-elections.
He has now confirmed that he will re-stand, saying he had a "good record" of service as a district, county and Cornwall councillor stretching back more than a quarter of a century.
When submitting his candidacy, Mr Brewer said he was re-standing because he had a "good record" of service as a district, county and Cornwall councillor stretching back more than a quarter of a century.