I have had this Humax Foxsat-HDR about a year, but over the last few months on certain channels, if I take back live TV I get subtitles come on, and they only go off if I take it back to real time !

Has any seen or heard of this before ? and do you know how I can stop it,

Turn the subtitles on the affected channels (I assume it's a HD one) and then back to off. If its 101 or 102 and you have used customise channels then this is a known bug. In all cases when you have them pressing exit twice should get rid.

Thank you worked a treat
Just have to find all channels that do it now, BBC HD and channel 5 so far

Channel 5 is a new one on me. It might be easier to make a note of your recording schedule and simply do a factory reset.