Quote from their site:
In conducting its work, the Inquiry is liaising with the Australian Royal Commission into Institutional Child Sexual Abuse, with the Independent Jersey Care Inquiry, with the Historical Institutional Abuse Inquiry in Northern Ireland, and with the Scottish Inquiry into Historical Abuse of Children in Care. Together the inquiries have much to learn from each other.
They are well aware of the ARC already which is good and liaising with it.
I think it will need a couple of real cases of abuse from the UK much like the Australian inquiry for them to get their teeth into if you want it to be featured.
But then if they closely liaising with other inquiries like the RCA they may not want to rehash the same turf and may choose to go a different route. I hope they rehash it of course and equally as in depth as the ARC did.