The letter was on Downing Street headed notepaper, and paid for by the taxpayer, but Labour has complained that it contained “propaganda” such as the statement: “We came into government with a long-term economic plan to rescue the economy.”
The letter was highlighting a £2,000 National Insurance tax break, and the Electoral Commission has asked Macpherson and Heywood to investigate whether it broke the rules.
A Number 10 spokesperson said: “The letter was drafted to target potential recipients of the new Employment Allowance, which could be worth up to £2,000 for 1.25m businesses. It is important that businesses are aware of this as soon as possible so they can check their eligibility and make use of the allowance.”