Jimbob
Thanks for repling. I'm mixing with a cordless and one of those adhesive heliciol attachments. The mix is smooth untill I put the last bit of grout in (100g or so) then it started to clump. Even leaving it for 2 -3 mins and then mixing again didn't seem to smooth it out
From previous home grouting experience (stuff from B & Q) the mix seemed to flow more whereas this mix has the consistency of cold magerine which needed quite a bit of pushing to get into the grout lines.
I'll try the next lot tonight with a little more water and see how I get on
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Mark