Sheffield-based VC Angel CoFund has announced that the firm is rebranding to ACF Investors and launching a new fund dedicated to startups across the UK. Known as the Delta Fund, its initial close lands at £30 million. With Delta Fund, a so-called ‘fast track’ fund, the VC is trying a new funding model that should provide high-potential businesses with access to larger sums of capital, faster. Though investments will be sector agnostic, they’ll otherwise follow strict parameters. Each investment will be made exclusively alongside at least three angel investors who are new to the business. Most importantly, there must be one lead angel investor with “demonstrable sector expertise” who has committed more than £70,000 to the round. ACF says this is the best validation of an early stage investment. With the angels in place, the Delta Fund will provide up to 49 percent in investment rounds greater than £500,000. Managing Partner Tim Mills says the new fund will “match the maturity of the UK angel investment ecosystem,” which the team has seen evolve over the last ten years. “Angel investment has become more professional, funding round sizes have increased, and so have the size of businesses angels invest in,” he said. The firm’s first fund will continue to operate under the name ‘Angel CoFund’. It has a portfolio of over 90 companies, including Form3 (which just closed a $33 million Series C round a few months ago), Gousto, Ebury and Creo Medical.