Very interesting that this is using the UK spot, so now the mystery of whether the upper bands (F for sure, probably E and G included) can do UK spot, it leaves the door open for Channel 4 to potentially switch TP40 to the UK spotbeam, amongst other broadcasters too.
To elaborate and agree with what Timo has mentioned a couple of posts above; whilst Sky have a vested interest in their European subscribers, Viacom, Discovery and UKTV, irrespective of their channels being encrypted, could benefit from extra bandwidth, in C4's case allowing the FTV encryption removal from C4 Ireland and 4Music. Viacom could, for example, gain another 10.5mb netto bandwidth on their 2E E band TP just by changing the FEC to 7/8 going UK spot - would give them an option for Channel 5 HD.
I'll be very curious to know what the uplink operators will do with the higher power ex EB1 C-band TP's once they go over to 2E/F/G as higher power will allow relaxation of FEC too.