Gbp/usd - 1.6473 ... The British pound tumbled fm 1.6676 to as low as 1.6460 on the weakness in global stock markets (European equities dropped 0.7%-1.2% whilst Dow Jones index futures fell by 74 points to 10255). Offers by various accounts are tipped at 1.6510/20 n 1.6540/50 with stops seen abv 1.6580. On the downside, some bids by st spec. are located at 1.6460/65 with stops seen below 1.6450.