The UK Budget for 2015 will introduce new measures on tax avoidance, particularly where there are "contrived loss arrangements" used to cut corporate tax bills. This will be directed at previous year trading loss reliefs which will be curbed or abolished. In addition, the Treasury intends to require the users of tax avoidance schemes which are challenged to make upfront tax payments of the disputed amounts. The area of concern for professional advisors is the penalties to be levied on those that promote "abusive" anti avoidance schemes. Question is: what exactly is an "abusive" scheme? I think the Treasury's answer will be that you will know it when you see it.