2Donkeys,
Thanks for the info. I'll get my felt-tip pen out!
GRP,
My supplier (Boutique de Pilote) did say that customers could exchange the chart from mid-May when it's re-issued, either at one of their branches (including the one at Le Touquet presumably) or directly with IGN at:
I.G.N. (Institut Géographique National)
Camp des Landes
Administration des ventes
41200 VILLEFRANCHE SUR CHER
France
squibbler,
I think my condensed translation in the original post was better than your machine's, though the latter does have a certain eccentric charm I admit!
The full version is along the lines of "We wish to inform you that IGN have asked us to withdraw the ICAO 1:500,000 South East chart from sale because it contains information which could put flight safety at risk."