An old work colleague and friend has a formally employed part time driving job which gives him time to fill for a few hours each day. I want to offer him work on an adhoc basis answering customer telephone queries, making some sales calls etc., He will be 95% home based which is some 50 miles up the road from our premises and will only be required to work at variable peak times, which could be some weeks apart, an arrangement which is mutually acceptable. Would it be best for him to set himself up as self employed and invoice us accordingly for work completed? We will be his only customer. Would we fall foul of regulations the would deem him an employee who should be on our books, despite the variable and inconsistent nature of the workflow and the fact he cannot work from our office?