  We present results from the QCDSF/UKQCD collaboration for hyperon
electromagnetic form factors and axial charges obtained from simulations using
Nf=2+1 flavours of O(a)-improved Wilson fermions. We also consider matrix
elements relevant for hyperon semileptonic decays. We find flavour-breaking
effects in hyperon magnetic moments which are consistent with experiment, while
our results for the connected quark spin content indicates that quarks
contribute more to the spin of the Xi baryon than they do to the proton.
