signs of T car clutch going?

[a1butch]

Hi.
Are there any pre-warning signs a clutch could be on its way out? I viewed a T350 at the weekend, covered around 30k without a replacement (to my knowledge).
Clutch pedal seems stiffer than I would like (compared to my recently sold Tamora where the clutch was replaced at 33k, 8k ago) and the bite point on the T350 is quite low.
Does any of the above suggest a replacement is due soon?