The short-term time and cash benefits of moving are clear: an extra hour for you each day, and more than £300 better off each month after the Exchequer's take.
-What are you learning in your current workplace? What would you learn at the new one? Not only from the point of view of technology, but also from a wider business perspective.
-How do the two businesses differ? Think present business model, future prospects, etc. Don't just consider how the companies pay salaries today, but how they will continue doing it tomorrow.
And now for the final one:
-How would the new workplace challenge, strain and push you further compared to the current one?
-How would you improve as a professional in the new job?