House of Lords
Lord Sassoon (Conservative)
The Government recognise that there is a balance to be struck between improving stability and predictability in the tax system and acting to reduce risk to the Exchequer.
At Budget 2011, the Government published a "Protocol on unscheduled announcements of changes in tax law" in the document Tackling Tax Avoidance. The protocol states that "changes to tax legislation where the change takes effect from a date earlier than the date of announcement will be wholly exceptional".