Why are my apps moving in an odd diagonal fashion on iphone5?

[Frozennortherner]

When on the home screen all my apps have started moving diagonally to and fro by about a centimetre - constant movement.

Anyone any idea what's caused it? All software is update and I ve only had phone for about a month

Do you mean all your icons are "jiggling"?
This is how you delete them. Click and hold until they jiggle, delete the one you want to delete, or alternatively click the home button (big square button in circle at the bottom) to stop the jiggle.

No but thanks Threeqtrs. It was something to do with a zoom focus setting I'd inadvertently switched on