I could have sworn that the Humax had(?) the ability to pad out recordings, and pretty sure I had set 5mins before and 10mins after the programme time. Indeed, I checked recent recordings of 'Outback Truckers' which were all 1hr 15mins running time, yet 'Tipping Point' has recently only been recording for 1hr (and always cutting off the contestant introductions).
Just can't find the time padding under any of the settings though.