Gaining QTS through the AO route is all about proving you have the experience. Yes I was able to use some evidence from my time teaching abroad. When you apply and are accepted onto the AO route, an assessor will meet up with you to discuss a plan of action. Therefore, you won't really know until you've met your assessor. The Universities in the UK that provide AO route should be able to provide you with information about how it works, so I would suggest contacting them first.