Inclusion Criteria1. Suspected clinical stroke with 6 hours of onset of neurological symptoms;
2. Age >18;
3. Written or witnessed oral consent, or relative/consultee advice.
Exclusion Criteria1. Pre-morbid dependency mRS>3;
3. Coma (GCS< 8);
4. Malignancy or significant co-morbidity thought to limit life expectancy to <6 months;
5. Blood sugar < 3.5 mmol/L;
6. Taking part in another clinical trial of an investigational medicinal product (CTIMP);