The cost of chronic wounds in the UK has recently been estimated to be between £4.5–5.2 billion annually, including comorbidities (Guest et al, 2015a), with leg ulcers alone costing £1.94 billion (Guest et al, 2017a). Reported healing rates for wounds and venous leg ulcers (VLUs) has been poor (Guest et al 2015a; Guest et al, 2017a) despite national guidance.