At £ 110.00 per m2 it bloody ought to be able to be cleaned !!
I would imagine Tony that it might be double-stuck, ie: underlay tackified to the floor, carpet stuck to the underlay - thats the way I would fit it.
I would lightly mist it with a microsplitter, thorough agitation, then HWE with lots of dry passes.
It's not as though it's sisal, but I would still be cautious though.