George Manwell 12 Burrows Buildings Blackfriars joined 5.5.1794 "unnumbered division" (QV)
I found no good identity yet. Possibles:
directory 1791 George Manwell builder 10 Newman St Oxford St
Oracle & Daily Advertiser 21.5.1806 died 10.5.1806 at Brompton, Middlesex Mrs manwell wife of Mr George Manwell of Walton-on-Thames
George Manwell otp wid 3rd banns at Christ Church Southwark 7.5.1809 Ann Ward Holden sp otp