For a live feed I use Proquote, which includes a goood charting package , but costs!
However, I always seem to be referring back to www.investor.stockpoint.com because I like the options, which include candlesticks, and world markets. The data is delayed though.
You can use QuoteTracker for UK stocks and get both intraday and historical charts. On Historical charts, just need to add UK: or GB: prefix to the symbols. For quotes, you can use ADVFN or soon to be added MoneyAM