The priced contract value is turning out to be 50% more than the actual value. Quantities were overstated and the Contractor mobilised based on false quantities.
In response to your headline question, the answer is ‘No’.
However, under clause 60.4 of option B, you can have a compensation event for reduced quantities.
While on the face of it you get paid less, in terms of rate x ORIGINAL quantities for those items over the 0.5% threshold, you get a re-rate to reflect the reduction in quantities. That ‘re-rate’ would be more than the original rate to reflect the under-recovery of overheads under the original rate.
Having said all of this, it’s not that simple as the re-rate has to take the form of a lump sum - presumably a deduction compared with a original quantity x original rate - in accordance with the last bullet point of option B clause 63.13.