This is the next funding stage for the 2020 investment programme being developed by the transmission companies to help meet carbon targets.
It follows the decision in January 2010 to fund an initial £319 million of investment.
More than £80 million of the ugrade cash will be spent by National Grid Electricity Transmission and Scottish Power Transmission on projects to increase the amount of electricity that can flow between the high-voltage networks of England and Scotland.
By 2020 renewables are expected to supply around 30% of UK electricity, up from roughly 7% today.Wind alone will supply some 20%, with increased amounts of wind generation sited away from centres of population - much of it offshore and in the Highlands and Islands of Scotland.
The existing electricity network is inadequate to meet the demands of these more dispersed and often variable forms of generation..png)
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