Let's get it straight, shall we? Tax evasion is a crime, tax avoidance within the law is a noble thing - and people would be mad not to arrange their affairs to pay as little tax as is consistent with staying strictly within the law. So let's have no more of this nonsence that tax avoidance is somehow wrong.
It seems ridiculous, and going well beyond the law, for the Chancellor to purport to require "accountancy firms ... to report new tax avoidance schemes to HMRC before recommending them to clients". What the Chancellor needs to do is employ tax accountants of a sufficient calibre and ingenuity to identify potential 'loopholes' in his own crackpot legislation and not expect to get such work done for free by people employed by others to find their way legally through the financial maze he is largely responsible for!!