Not really surprised to hear this Brydo. It is something that needs to be addressed.
Anyone can give a donation or loan to a political party, individual or other organisation. There is no limit on how much someone can give if they are a permissible source.
It is up to the political party, individual or other organisation to check if the donation or loan is from a permissible source, and if they can accept it or not.
Permissible sources in Great Briton.
individuals registered on a UK electoral register, including overseas electors and those leaving bequests
most UK-registered companies
Great Britain registered political parties
UK-registered trade unions
UK-registered building societies
UK-registered limited liability partnerships (LLP) that carry on business in the UK
UK-registered friendly societies
UK-based unincorporated associations that carry on business or other activities in the UK
some types of trust and certain public funds
Where someone pays for the reasonable costs of an overseas visit, they are deemed to be a permissible donor.
Of course they don’t, Joss, they do it to buy influence or to get a knighthood or both. Twas ever thus. Same as lobbyists, they splash money about in parliamentary circles like there was no tomorrow. One of the reasons people want to be MPs of any party is to join the gravy train of all that wealth.