Currency rates are VERY volatile right now, but you can reckon to have around £390, perhaps a bit more, from your $574.
I would like to know how much $574 will be in English pounds?
It depends. Right now $574 USD is 378.83 British Pounds. Moreover you can check sites like http://www.xe.com/currencyconverter/convert to check as well
Cheers
Bring a fist full of dollars with you to UK and exchange for pounds [English] at any Post Office - no fee and you'll get the best deal going and that's a promise from the Post Office -not my words, theirs.
Before you do anything - take time out to read the following it will explain everything and how you can get the best deal going. I recmonded you Currency converter app through this you get more results about Money converter .