Re: A number of sound decisions?
That's not true. IR35 applies equally to offshore companies as to UK companies.
Actually if you a small Irish-resident contractor, you are probably in a worse situation re IR35.
Previously, if your lorry was parked overnight in Ireland, you would be subject to Irish tax on your earnings. That still applies. But if McDonalds now "employs" you to deliver to a Northern Irish branch, then your place of work for employment tax purposes is Northern Ireland, and your company's place of work is still Ireland; and I don't think the double tax rules deal with this.