Vibration in clutch peddle

[David]

I fitted my front mount the other day and I had move the engine forwards off the mounts to change my inlet manifold.

I went back together all fine blah blah blah

Took it out for a spin today and I've sometimes got vibration through the clutch peddle, I rang dan! Up and he said it could be down to the engine mounts not being done up properly but I've now double checked that and they seem fine.

Any ideas?