clutch travel

1987 90 landy, recently jumped in and noticed that the biting point for the clutch has changed, used to be about halfway, now its nearly fully to the floor before engaging/disengaging.
Not using any fluid so its not leaking from the slave cylinder, and i've travelled about 300 miles in it without complete failure, just seems odd. Not crunching into gear...i'm stumped, any ideas?

slowly push yer pedal down until you can just get into gear. then release slowly and see where it starts to bite. there should be a difference and the furthur apart the two points are the more knackered yer clutch plate is.

if you replace it early enough it will save you the price of a pressure plate