If you have the classic limited company set up offering IR35-proof services you can loan yourself whatever amount you need from your company at 0% and pay it back years in the future, hold a directors' meeting and take dividends, or pay home office expenses like electricity on expenses anyway.
So, about the income tax drop which amounts to nothing in the grand scheme of things, hence the £1000 items for you and pocket change for someone on an average wage and nothing for the poorest. Imagine what would have happened the government forced electricity suppliers to hold bills down with a windfall tax or similar, as governments in other European countries have - everyone would have been able to benefit instead just people who earn what you earn or more. So your appreciation for the government's incompetent budget rings hollow.