You beat us to it! 
This feature is available for all US stocks majority of FTSE 350 stocks. Prices on all other UK stocks and ETFs will continue to show 15 minute-delayed data from the LSE.
Read more details on the blog, and watch our promo video below now. 
https://www.instagram.com/p/CRyqNUfqHs6/
Remember, live prices are still indicative and the price you execute at will likely vary from this. Likewise, the gain you see on your portfolio or stock holdings is indicative and not necessarily the profit you will realise by selling your stocks or portfolio. Sometimes prices can be delayed so always check the timestamp on the stock’s page for context regarding pricing data.