Thank you for the advice.
This afternoon I have taken the clevis pin out, checked and lubricated it. I have also greased the pushrod and pedal shaft.
I did notice there is a clamp to the left of the clutch pedal with 3 bolts. The centre bolt was partly undone so I retightened it.
Put the carpets back in, pressed the pedal and the “click” is still the same!!
Think it needs further investigation from underneath.
Regards
Simon