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HEX: the cost

Planned

Balfour Beatty's original tender value: £60M

Trial tunnel cost £1.1M

Unplanned

Cost of collapse to BAA £35M

Cost of collapse to Balfour Beatty £35M

Cost of collapse to BAA and Balfour Beatty's insurers £100M

Cost of airport disruption £50M

Cost of shutting down JLE sites as a safety precaution £200M

Fine for Balfour Beatty £1.2M

Fine for Geoconsult£0.5M

Cost to Geoconsult of expert witness report £0.125M

HSE prosecution costs £0.88M

Total extra unplanned cost £422.7M

(Excluding cost of precautionary two week London Underground Piccadilly line closure, Balfour Beatty's legal costs and Geoconsult's legal costs)

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