"The work is essential to allow the next phase of the reopening process to progress, " said Portishead Railway Group vice-chairman Colin Howells.

BBC: Portishead railway line cleared ahead of track checks

An essential guide to how to avoid repeating a particularly nasty phase of our economic history.

ECONOMIST: Acknowledgments

This knowledge is essential, and your company will benefit from it at every phase of growth.

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The first phase of development will include demolition of existing buildings, essential infrastructure work, new buildings and refurbishment of facilities.

BBC: RAF Lyneham: Bids invited for ?230m defence college

Edinburgh City Council called for an early announcement on the next phase "north of the Border", while Glasgow City Council said it was essential construction "begins at both ends of the country and meets in the middle".

BBC: Scotland