*Pound Falls Further To 5-day Low Of 1.2850 Against U.S. Dollar

*Greece May Industrial Production Down S.a 4.1% On Month Vs. +4.2% In April

*Pound Slides To 0.8579 Against Euro

*Pound Falls To 1.2660 Against Swiss Franc

Greek may Industrial Output +2.9 Pct Y/y from revised +3.3 Pct in April