The Income Tax (Earnings and Pensions) Bill was introduced in the House of Commons today. Its purpose, in the explanatory notes, is stated to be "to rewrite tax legislation relating to income from employment, pensions and social security so as to make it clearer and easier to use."
The "clearer and easier" Bill has 725 clauses and eight Schedules. I have no intention of reading or summarising it! If anybody wants to produce a summary, I would be happy to distribute it.