Thanks for the replies.
I have had it confirmed I do indeed have the latest software version which disappointed me as I believe time slip is seriously flawed. Humax have also confirmed it is behaving as it should be.
To clarify my main gripe, let's say I'm watching Coronation st on itv1 at 7.30. I pause it for 10 minutes. At 8pm it throws me out of time slip and back to live TV. This happens on any channel and is not when I am also recording. The unit is not doing any other jobs at all.
I have learned to record from where I want to pause but it is sometimes easy to forget and miss the end of the programme.
Very disappointed humax told me today that this is correct behaviour!