Born and raised in Gower, Byron was educated at Knelston County Primary School and Gowerton Boys' Grammar School and has an honours degree in law. He is married to Gill and they have one son.
Byron is a member of the Assembly's Enterprise & Business Committee. Byron was appointed Shadow Minister for Transport and a Whip by Leader of the Welsh Conservatives in the National Assembly, Andrew RT Davies.
Byron's career as a police officer was in London's Metropolitan Police, where he was seconded and served for a number of years at the UK National Crime Squad. During this time, he was seconded to the European Union as an advisor on combating organised crime. He spent several years living and working in Eastern Europe, helping to prepare EU candidate countries for accession. He is the author of European Union Commission progress reports for several countries in the Balkan region and prior to election to the Assembly continued this work as an independent advisor.