....and I was about to chuck my Navtex overboard ( I mean dispose of it environmentally correctly) all I have to do is programme in just E and delete the now dumb S to receive Solent/Wight weather?
<font color=red>> Navigational warning SA45:
NAVAREA ONE 326
AT 171200Z SEP 02, NITON (GNI) NAVTEX BROADCASTS WILL CHANGE AS FOLLOWS:
A. THE TRANSMISSION IDENTIFICATION CHARACTER (B1) WILL CHANGE TO 'E'.</font color=red>
was posted on uk.rec.sailing NG, and again on 28/8. So I suppose it must have been promulgated in some such publication or magazine around the same time. My archive of the NG does not go back further.