tv virgin media recording problem?

I have the virgin + box where you can just push 1 red button to record a programme. I find that if the actual programme to be recorded does not start exactly on time that I miss the end of it. Very frustrating to watch a film all the way through and find the ending missing and the message "we hope you enjoyed this." I know that I can set times etc but surely the function of the red button is to save all that hassle! Maybe there is a feature that allows you to record a few minutes after the programme is due to finish just in case. Can anyone advise. Tired going through on line virgin stuff.