JOHN LICHFIELD'S article "France expands rail empire" (9 August) fails to give a comprehensive portrayal of the situation. The TGV operates at its maximum speed of 300kph only on tracks that run in more or less straight lines. It functions rather less fast on a lot of old tracks. The map needed to distinguish between existing fast track, old track used by the TGV, lines that could be converted and lines that can never have the TGV (Paris-Orleans-Toulouse).
M W LEE, Oundle, Northants
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