Cheers guys.
Well I went round to grout the tiles last night but ran out of grout! I had bought some which should have covered 15m2 but the tiled area was only 5m2 and I had still got about 1.5 m2 to do when all the grout was gone. I felt had mixed it to a pretty good consistency - it went on ok, not too thick, not too sloppy. So what did I do wrong? Anyway, going back on Saturday to finish the final bit.
To be honest, I've had enough of this particular job now and I need to step back from it and decide on my next step. It has been really really tough, both physically and in terms of stressfulness, especially when I've been at work during the day and then going and working again in the evening as I did yesterday.
I think I would do with a couple more friends and family type jobs before I can start even thinking of calling myself a professional and branching out into the wider world.
I'll hopefully get some pics taken this weekend when its all finished.