A method of manufacturing a modified atmosphere package is provided which comprises the steps of: providing a portion of packaging material; providing a portion of produce; forming, from the portion of packaging material and the portion of produce, a closed package defining a package volume and containing in the package volume the portion of produce and a modified atmosphere. The modified atmosphere is modified with respect to the ambient atmosphere. The method comprises providing the modified atmosphere in the package volume by providing a gas mixture of at least one atmosphere modification gas and pressurised air in the package volume. An associated apparatus is also provided.