HMRC
I wish HMRC the best of luck, but I suspect that the multinational digital services companies will be several steps ahead of them when it comes to taxation. This in a country where the duchies of Lancaster and of Cornwall pay no CGT or Corporation tax because they are the 'private' businesses of the monarch and the heir to the throne (https://www.theguardian.com/uk-news/ng-interactive/2023/apr/05/revealed-royals-took-more-than-1bn-income-from-controversial-estates-king-charles-queen-duchies-cornwall-lancaster) but people living in social housing cannot get the landlords (sometimes local councils) to keep them in good enough repair to prevent mould (which killed a little child recently: https://www.independent.co.uk/news/uk/home-news/awaab-ishak-death-mould-housing-b2225448.html).
I have little confidence in multi-millionaire politicians with great wealth in tax havens in effectively challenging tax loopholes for companies. Let's hope I'm wrong.