Hi having a little change around in my tank, I was wondering are there certain sps  corals that can be placed close to each other with any issues , I see pics of tanks where sps corals grow next to each other with the branches touching etc

To be honest, everyone I've known who've had packed SPS tanks, including @glennf and @Mayo have just let them get on with it. Obviously within reason, but when it's getting dense, you just have to let nature take it's course.

If you're much less densely packed than that, just space them out based on aggression. I don't know much about SPS aggression, but it's well documented with LPS. So there should be some guides or info about SPS aggression.