4G will only be accessible to those with phones like iPhone 5 and Samsung Galaxy SIII LTE.
Until today Britain has used 2G and 3G networks to connect phones and tablets to the internet on the go. 4G allows users to download more quickly with promised speeds 5-7 times faster than today's 3G by 2014.
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Gates giving access to the walls have been shut between Fishergate Bar and Postern Tower.
Olivia Bonnick-Campbell is thought to be carrying a black handbag and wearing a silver necklace with large, hooped earrings.
The gallery is the only British museum on the list of 46 nominees from 24 countries.