Frost at 16 Pepper St, Lomans Pond, Southwark was an address for LCS signatures 12.11.1795, and the president of Div 15 of the LCS on 18.9.1797 was called Frost (see Thale). Nearest but unlikely identification I found was John Frost pawnbroker of Tooley Street Southwark will proved PCC 21.1.1799. Though both in St Saviour's parish, Tooley Street and Lomans Pond were not particularly close.