Thanks again everyone who replied.
I was wishing that I could put them on the stands as it is limited space and it will mean that they will sit behind the front of the buffet the TT & 3400 is on. Thanks Graham for the link, I do know a guy who is handy with a welder and there's not much to those stands really, but mine are precisely like the white ones in that post.
I'll screw a solid screw or two into the wall and see how they go. It's interesting the instructions even tell you which speaker to use for left and which one to use for right!
And hello again to Mehahem if you're still out there. Once the interior of my house if finished, then I have been TOLD that I can spend some money on upgrading the BM3400.