Each year in the UK around 130,000 people suffer a stroke and often lose the ability to walk and use their hands. Although most patients who survive a stroke will walk independently again, only a third will recover independent arm function. Losing the ability to use your hands leads to a considerable reduction in quality of life and dependence on others. This research will investigate whether treatment with electrical stimulation can be used to help the recovery of arm function in people who are at risk of remaining chronically disabled after their stroke. Treatment with electrical stimulation may also help the patient by preventing the development of secondary complications such as pain and limb deformities.