Thanks Robbo I used a sand /cement mix but was a bit concerned if it would be OK.
Can't find the diy not debate, perhaps I'm on the wrong bit.
If I want to post a link I go to the page I want to link, highlight the address by right clicking it, choose copy, go to the post I want to write then just paste it into the post. There may be an easier way?
http://www.diynot.com/This is where I was looking and couldn't find a builders section.
Keith
EDIT... slight problem here as we can't write d!ynot or have it included in a hyperlink