You can indeed donate to a private company, the private company can hold those donations ad then claim tax relief on it. I help my father with his own accounts as he has his own business, he has my mother and myself as share holders and as such monies can be donated into accounts where you can claim tax relief. Its a well known tax dodge. My father shows to HMRC what is donated and to whom or where, after this tax relief is given.
Receipt received "for entry" is classed within the law of Tort, as an invitation to treat.
Value Added Tax (VAT)
Donations
Donations, bequests or other voluntary contributions from the public are outside the scope of VAT, provided the donors receive no direct benefit in return.
"Charges for admission to fund-raising events which are not eligible for VAT exemption arranged by supporters of an appeal are liable to VAT if they are the proceeds of a taxable business activity which exceeds the VAT registration threshold. But voluntary donations made on top of a basic minimum charge for a fund-raising event will be outside the scope of VAT if all the following conditions are met (the minimum basic charge remains subject to VAT):
it is clearly stated on all publicity material including tickets that anyone paying only the minimum charge will be admitted without further payment;
the additional payment does not secure any particular benefit (for example admission to a better position in the stadium or auditorium);
the extent of further contributions is ultimately left to ticket holders to decide, even if the organiser indicates a desired level of donation;"
[ARCHIVED CONTENT] HM Revenue & Customs: Guidelines on the tax treatment of appeal funds
[ARCHIVED CONTENT] HM Revenue & Customs: Special rules for certain types of donations
https://www.gov.uk/tax-limited-company-gives-to-charity/sponsoring-a-charity
Self-assessment: what you can and cannot claim for | Money | The Guardian