I have been banned from driving in the UK, but my job is taking me into Europe am I am taking a driving test in my new country of residence. If I return home to visit during the term of my UK ban, will I be able to drive on my new European licence?

Unfortunately, your non UK licence will not be valid in the UK whilst the driving ban is in effect.  The ban overrules any entitlement that you may have to drive as a “visitor”.