Andrew Stephenson replaced Paul Maynard in reshuffle at transport ministry
Second phase of railway could see involvement from China
Timing had been thrown into doubt after resignation of Sajid Javid last week.
But transport secretary adds there have been no official conversations over Chinese firm’s offer to build line in five years
CRCC will work with UK government ‘if necessary’
Construction's 'many tiers of subcontractors' has helped see price of railway soar