Consultation: If you read Mr Jamieson's parliamentary answer regarding AIS and NOTAMs (5/11/02), we were allegedly consulted about AIS briefing changes as well.
Take from that what you will.
AIC: I believe the intent of the AIC is that an IRI can instruct for an IR or an IMC (within the UK), not that an PPL IMC holder can instruct anything.
Mode S: aware of what you say, but
AFAIK the extension to 2005 only applies to aircraft operating in UK airspace. Not "G reg anywhere" - Happy to be proven wrong though
Since this whole discussion is about IFR in Europe (or an IMC would suffice) the 2003 deadline may be quite relevant