Chief Secretary to the Treasury Danny Alexander said the £25 billion investment from insurance companies into British infrastructure projects was a "massive vote of confidence".
Speaking at the construction site of National Grid's London Power Tunnels, Mr Alexander said the investment was "more evidence we are rebuilding Britain."
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The British territory will allow only domestic partnerships after senators approved the Domestic Partnership Act by an 8-3 vote.
More than 1,500 people are expected to attend the multi-faith service, including many bereaved families and survivors.
The app enables people in Devon and Cornwall to view current waiting times for local emergency departments and minor injuries units.