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Story summary
- Transport Secretary Heidi Alexander has asked HS2 Chief Executive Mark Wild to reduce speeds from 224 mph to 186 mph to cut costs.
- Experts, including rail consultant William Barter, say the savings are unlikely and could complicate operations.
- Over £46 billion has been spent, with costs projected to exceed £100 billion.
- A new study ordered by the government delays the timeline and heightens uncertainty.
