Not sure if there is a problem with my set up, I'm getting around 70p/c signal on 1west using a 90cm dish in Belfast, which is more than enough signal I think

Recently some channels are occasionally not working, like sometimes C More Hits HD works, sometimes it says "INGEN SENDING" whatever that is

I had to do a scan recently, I have noticed lots of HD channels no longer there, C More First HD for example. Has something changed on this sat or is it likely to be an LNB/signal issue?