The Vanguard Funds Vanguard S&P 500 ETF is a fund that tracks the USA’s largest Index, the S&P 500.

https://www.vanguardinvestor.co.uk/investments/vanguard-s-and-p-500-ucits-etf/overview-tab

£14,674m of assets in this fund.

http://www.shareshop.hsbc.co.uk/shareshop/security.cgi?username=&ac=&csi=2701271&record_search=1&search_phrase=vusa

Vanguard S&P 500 UCITS ETF seeks to track the performance of the index, a widely recognised benchmark of U.S. stock market performance that is comprised of the stocks of large U.S. companies.