I operate from a farm strip that is outside of the Solent zone but will come under the trial area, I am not transponder equipped so just tune to Solent as I climb out, if Im'e going somewhere I talk to them but I often don't because my flight will remain local. I have heard Solent blind calling a contact that radar shows as infringing or about to infringe, without reply, so I believe that by being on frequency should be good enough if I got it wrong.
What I think is bad is the CAA guide
http://www.caa.co.uk/General-aviation/S ... ace-trial/ which shows a modified section of chart with the new zone and text saying SFC-BASE OF CONTROLLED AIRSPACE but this text has completely obliterated the line marking the Solent CTA at its southern edge.
I know its just a guide but someone not familiar with the area might use it innocently and end up in trouble, seems shoddy to me.