Thanks for the interest!
Ok, Just updated everything to latest as suggested.
I'm going through everything again, looks like the TypeScript version of the starter app is not ready yet.
https://github.com/driftyco/ionic2-starter-tabs/tree/typescript
I'm copying the configs across and moved the "app" folder out of "www".
This is my latest achievement
GET http://localhost:8100/app/app.html 404 (Not Found)
Guess there is something I've missed.