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<p>The Department does not generally make an assessment of the causes of individual
operational incidents. Network Rail, as the infrastructure provider, is best placed
to do this. I am aware, however, that on this occasion the problems were caused by
<del class="ministerial">two power surges from the National Grid</del> <ins class="ministerial">a
failure of the power </ins>supply to the signalling centre in Basingstoke that damaged
the signalling equipment which had to be repaired and reset.</p><p> </p>
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