All companies should pay proper tax including Margaret Hodges dads company Stemcor.
https://www.telegraph.co.uk/finance/newsbysector/banksandfinance/9694452/Stemcor-denies-abusing-corporation-tax-system.html
It's all outrageous but it's up to politicians to change the law to stop it from happening, which won't happen while it is in their interests to keep the status quo.