Thought that would be the case but I haven't been able to find it explicitly stated anywhere.

Yes, Tier 2 General Visa looks like the best avenue to explore.

I have been working with the same company for 7yrs. I had previously worked in our Australian office for 5yrs and have been working for past the 18 months in our UK office on a Tier 5 Youth Mobility Visa. Do I meet the eligibility criteria for Tier 2 ICT as a long term staff member? I suspect becaus...