The shift was caused partly by new discoveries of uranium ore but mostly because mining companies were forced to revise upwards the cost of extracting previously identified reserves.

Analysts have been forced to revise upwards their forecasts, with some forward measures suggesting that prices will reach $125 a pound this year and $140 a pound in 2008.

Note that recommendations were subsequently revised upwards, e.g. 30 mg/kg for adults.

Operating frequency, hours of operation and number of trainsets have been continually revised upwards to accommodate the ever-increasing number of passengers.

This was later revised upwards to a week.