So, what are the clues?
Firstly, the detail of his unusual right ear is similar to a fingerprint in terms of identification:
Secondly, we have the age progressed images showing how he may look age 25 with and without glasses. He needs strong (8+ dioptre lenses) but could wear contacts. His vision is very poor without correction, something that could be noticed.
Fourthly, his walking gait is unlikely to have changed significantly (unless he has sustained an injury). Whilst this CCTV footage is not ideal, it gives some impression of Andrew’s walk: he tended to walk quickly.
Do you know anyone that seems to have this combination of identifying factors? If you believe you do, please contact Missing People on 116000. The number is free of charge and operates 24/7.