FastWire REvascularisation of Extremities, (For LOWer Limbs) - Feasibility Study (FREEFLOW)

Inclusion Criteria: 1. The patient, or the patient's legal guardian has signed and dated an Informed Consent Form. 2. Aged between 18 years and 85 years (inclusive). 3. Severe claudication assessed as Rutherford category 3 or CLTI assessed as Rutherford category 4 or 5 LEAD. 4. Angiographic confirmation of a de novo, CTO, infrainguinal ligament including above the knee, below the knee, or below the ankle vessels. Exclusion Criteria: 1. Life expectancy of less than 12 months. 2. Females who are pregnant or lactating (urine test for women of childbearing age). 3. Myocardial infarction or stroke in two months prior to the index procedure. 4. Known, unstable coronary artery disease or other, uncontrolled comorbidity. 5. Any known haemorrhagic or coagulation deficiency. 6. Evidence of active infection, including but not limited to the target limb. 7. Current use of cocaine or other substance of abuse. 8. Patients who have received any thrombolytic therapy in the last two weeks. 9. History of severe allergy or contraindication, to contrast medium or other medications used during or after endovascular therapy. 10. Subject participating in another study involving an investigational drug or device 11. Patient has surgery or vascular intervention planned within 30 days of the index procedure. 12. Patient has had a previous peripheral bypass that includes the target vessel. 13. Patient has had a previous intervention in the target CTO (angioplasty, stenting) including at time of index procedure. 14. Patient tests positive for coronavirus disease (COVID-2019), as per site standard practice. 15. Estimated Glomerular Filtration Rate (eGFR) of less than 30 ml/min. 16. Platelet count \< 50,000.