Cerebrovascular disease, including cerebral revascularisation, aneurysms, arterio-venous malformations, cavernomas, dural fistula • Tumours of the skull base and carnio-vertebral junction, meningiomas and benign tumours of the brain and spine and degenerative spinal conditions • Neuroendoscopy, head injuries, hydrocephalus and shunts Cardiff University Bond Solon Expert Witness Certificate