Barclays Bank PLC (“Barclays”) announced an investor guidance notification today regarding the iPath ® Dow Jones-UBS Natural Gas Subindex Total Return SM Exchange Traded Notes (the “ETNs”). The ETNs currently trade on the NYSE Arca stock exchange under the ticker symbol “GAZ”. Barclays previously announced the temporary suspension of further issuances of the ETNs on August 21, 2009. As described in that press release and also in the pricing supplement relating to the ETNs, the limitations on issuance and sale implemented could from time to time cause an imbalance of supply and demand in the secondary market for the ETNs, which may cause the ETNs to trade at a premium or discount in relation to their indicative value. Recently, there has been a persistent and material premium in the trading price of the ETNs on the exchange in relation to their intraday indicative value. From January 31, 2012 to May 17, 2012, the indicative value decreased by approximately 19% from $3.02 to $2.46 per ETN, while the closing price of the ETNs on the exchange increased by approximately 18% from $3.13 to $3.69 per ETN. The closing price of the ETNs on the exchange as of May 17, 2012 reflected a 50% premium to current indicative value. Due to likely continued fluctuations in this premium, Barclays believes that the ETNs are currently not suitable for most investors and will not track the price of the underlying natural gas futures index in a consistent manner. Investors considering any purchase of the ETNs should be aware of the fact that the intra-day market prices of the ETNs on the exchange could be significantly higher than the intraday indicative value of the ETNs as calculated with reference to the level of the underlying index, minus an investor fee. The secondary market for the ETNs has been volatile and unpredictable, and investors should not assume that the ETNs will continue to trade at a premium in relation to their intraday indicative value.