A medical access port (10) has a base (12) and a lid (14). The base (12) has an adhesive layer (26) which may be exposed by pulling a peel layer (28). The port may be then stuck onto a bag (54) and an access aperture (34) may be enlarged, if desired, by cutting through a mounting substrate of the port (10) and a substrate (58) of the bag. The lid (14) may be opened and closed as desired and the access port may be located in the most suitable configuration for the particular use application concerned.
