A method of providing a wound dressing is described wherein: liquid is supplied to an outlet in the vicinity of a substrate (7) on which the wound dressing is to be provided, liquid issuing from the outlet is subjected to an electric field to cause the liquid to form at least one jet of electrically charged liquid, the liquid being such that, after formation, the at least one jet forms electrically charged fibre matter which is attracted to and deposits on the substrate (7) to form a mat or web on the substrate (7), and the mat or web is provided with material for promoting or causing tissue repair. A device (9) for providing such a wound dressing is also described.
