There doesn't seem to be a lot of FTA HD channels on 4W, unless I'm missing them, the only FTA DVB-S2 channels I can spot are:
10890 H 30000 DVB-S2 QPSK 3/4 BNT World & SKAT
10926 H 30000 DVB-S2 QPSK 3/4 W4 & Box TV
Can you please try manually scanning in these channels and report back if you can receive them.
If you know of any others, on 4W, that I've missed, can you please post the details.