Robert Oxley, campaign manager for the Taxpayers' Alliance, believes the Government is "cherry-picking" its figures for HS2 and is creating a "fake boogeyman" by claiming that the alternative - upgrading the current network - would mean years of disruption.
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Winds will veer northerly overnight with colder air streaming in over the next few days.
Protesters angry that far-right leader Marine Le Pen is advancing the French presidential runoff are scuffling with police in Paris.
Polling projections show the far-right leader Marine Le Pen and centrist Emmanuel Macron leading in the first-round of the French election.