Stephen has had an interest in birds "all of his life" – at least, according to his parents, he had learnt to tell the difference between a Blue Tit and a Great Tit and between a "mummy sparrow" and a "daddy sparrow" by the age of two-and-a-half. His interest became serious at around the age of eight or nine, when he would spend break times at school watching the birds around the playing fields. Soon after, he attended birdwatching walks with the Liverpool parks ranger service. At the age of 11, he joined the RSPB Liverpool group and within two years had become a member of their committee.

Since then, Stephen has travelled to many destinations within the wider Western Palearctic, including Oman, Israel, Georgia, and Morocco/Western Sahara. In 2010, he acquired a BTO ringing permit and subsequently spent three months working as a ringer in Catalonia, Spain, before returning to the UK to work for BirdGuides Ltd in London. Between 2012 and 2014 he spent several sabbatical periods – two spring and three autumn seasons – ringing at Falsterbo Bird Observatory, Sweden, experiencing two of the busiest autumns ever recorded at the observatory.

Stephen's main interest is in moult, ageing, and identification – particularly in Passerines – and has authored a number of papers. He is a Director at British Birds and a member of their Editorial Panel. He also sits on the British Birds Rarities Committee.

Stephen is now back living and working in London, working as a Project Manager for The Sound Approach. He previously worked for app-development company NatureGuides Ltd where, amongst other things, he worked as Producer for development of the multi-award winning Collins Bird Guide app..

When he's not in the office or out birding, Stephen can usually be found at the ballet.