Focus 1800 Intermittent Idle Issue

Hi,

My year 2000 UK Focus has developed an intermittent fault.

Normally it's when the engine is warm, and I've been travelling above

When I take my foot off the accelerator, the car will keep going at roughly the same speed. If I dip the clutch, the engine can race to as high as 4000rpm.

Could this be the ISCV I keep seeing references to?

thanks in advance Phil