Dear Mr Griffith,
Thank you for your letter of 31 October about the changes to taxation announced in the Autumn Budget.
As set out in my letter of 4 June to party leaders, and referenced in your own letter, it is essential that, when making claims of this nature, underlying calculations, data sources and context are provided alongside the figures so that the average person can more fully understand any single figure cited in public debate.
These actions will ensure that when statistics and quantitative claims are used publicly, they are adhering to the principles of intelligent transparency and therefore enhancing understanding of the topics being debated.
Since the election, we have continued to affirm the importance of these principles for all and expect all those in government and in parliament to adhere to these in all forms of public communication.
Yours sincerely,
Sir Robert Chote
Chair