I'm trying to watch Die Hard under the Christmas movies on Sky Cinema on demand and it is ridiculously quiet. My TV is normally on about 20 volume and I've had to turn it up to over 60 and it's still not that easy to hear. When I pause it or the TiVo makes any noises those default sounds are extremely loud as a result but the film is still very quiet
if you're watching in HD (therefore on an enhanced dolby something soundtrack) there's a fair chance it'll be down to that.
i've noticed HD broadcasts (and watching from my old Sky+ box) needed a noticeable increase in volume compared to SD / TiVo
probably too late but... just make sure you reduce the volume before turning the telly off (or do a left arrow to go into the menus before turning the telly on) - don't need any high volume surprises tomorrow morning 🙂