Make Stonewall Pay Its Taxes!

The Stonewall Group has wrongly been granted charitable status and avoids paying tax. Under British law, it is not permitted for charities to engage in any sort of political campaigning or lobbying to change laws.
"It is considered unacceptable for charitable trusts to
campaign for political or legal change, although discussing political
issues in a neutral manner is acceptable." Yet Stonewall has never stopped campaigning on political issues for the last 30 years!
They state on their own website that they were formed to campaign against Clause 28 of the Local Government Act. That is political and so are all the campaigns they have conducted since then e.g. to lower the age of consent or to advocate homosexual adoption "rights". Stonewall's banner advertisements on London buses for the view that homosexuality is innate (a view not supported by any scientific evidence) can hardly be described as "neutral!"
Stonewall has never been entitled to claim charitable status. Therefore its charitable status ought to be withdrawn and it should be required to repay to the Inland Revenue all the tax that it has improperly avoided since being founded.