Complex sentence: His conspicuous bravery was recognized by a Mention in Despatches as none of the other relevant decorations then available could be awarded posthumously, it was published in a supplement to the London Gazette on 8 June 1944.
Split into simpler sentences: His conspicuous bravery was recognized by a mention in despatches as none of the other relevant decorations then available could be awarded posthumously. It was published in a supplement to the London Gazette on 8 June 1944.