Very unlikely that anything will be received from this bird, as from southern England the elevation is only 1 degree or so. I'm not convinced the you would get a signal even if you were in a sufficiently elevated position. I believe this bird has a SE Asia and Australasia footprint so it probably doesn't transmit in this direction.
Also note: the only regular Ku-band signals on the European spot beam disappeared a few months ago (they included Showtime, and later (briefly) Fox-News & part of the Star service). So unless you happen to catch a feed, you won't have anything there to pick up however big your dish.
Even the old Showtime ku-band transmissions were only receivable on the Vertical transponders (same as Nilesat - the Horizontally polarised signals are much weaker in Europe). But for ther vertical ones, a 90cm dish would indeed have sufficed.
In fact, there used to be a ku-band analogue signal there too - Simayeh Somethingorother. But I think that's gone now too. For that, you needed a fairly hefty dish (1.2-1.5m).
Of course, there still is a lot of C-band on that satellite(including Multichoice) but for that you need a dish of upwards of 2m.
Those channels are not feeds, they are mainstream regular broadasts. A feed is a signal not usually intended for general public consumption, usually sporadic and transient (typically a feed is used to transmit unedited news source from a remote location to a broadcaster's main base, or else for those "live, on location" segments in the news).
"C-band" is the band of frequencies between 3700 & 4200 MHz.
All the channels you mention are in that range - so yes, they are c-band.
By the way, the same channels ARE in Ku-band too, but those signals are carried on the South African spot beam (not receivable in Europe however big your dish...)