I turned on the TV on to watch a bit of YouTube - no sound.
I tried the freesat box still nothing
I went into settings and fiddled with everything - still nothing
I turned the tv over and checked all round for a hidden switch - nothing
20 minutes of mucking about when I found it - yes I have been pushing the channel button on the remote and not the volume button.

The free sat controller has the volume button on the opposit side. Where's the bloody uniformity.