Why you say Crystal Palace switches to DSO in April 2012,
when the date has not been announced yet by Digital UK?
The Channel Islands switch to DSO on the 17 Nov 2010,
but it will be treated as a Relay Transmitter,
so only two Muxes plus the HD Mux,
giving viewers only 20 SD Channels
and some HD channels as well,
if they upgrade their equipment
to the DVB-T2 and MPEG4 standard
with the Freeview HD logo on the packaging,
it should not be so much a problem here,
as they do not have Freeview here yet anyway