Measurements of the polarisation of the Cosmic Microwave Background (CMB) represent a powerful and unique tool for cosmology.

Such measurements can potentially answer some of the most fundamental questions in physics: Did the Universe begin with a “big bang”? What was the underlying physics at the GUT-scale energies present in the early Universe? What is the ultimate source of structure in the Universe? I will present the latest results from the QUaD experiment, a recently completed ground-based experiment designed to measure the polarisation of the CMB on small angular scales. Our results break new ground in the field, where for the first time, we detect multiple acoustic peaks in the E-mode polarisation CMB power spectrum. Finally, I will give an update on the status of the upcoming CLOVER experiment, which will search for the characteristic B-mode polarisation signature of Inflation.