As the industry has witnessed the exponential rise in the number of contractors working via umbrella firms since the introduction of the new IR335 legislation earlier in the year, we have also seen a proliferation of disguised remuneration schemes. That rise has meant that many contractors may have been hoodwinked into signing up for tax avoidance schemes that could have a significant impact on their finances in time.

https://www.thehrdirector.com/why-does-hmrc-allow-tax-avoidance-schemes-to-thrive/