I found this site that transmits radio commentary for most UK football games live (even some of the lower leagues) The commentaries come from local radio stations (commercial & BBC) and also sometimes from individual club web sites which means a few times I have had to listen to very biased commentary! They also show text up-dates on all other games at that time.
They don't always have all cup games available but I see tonight you can listen to the Newcastle v AZ Alkmaar game but not the Spurs or Rangers games.
http://matchlive.safc.premiumtv.co.u...me.html?reload
click on the GO button next to your game and it will then tell you bottom left if they have it available. Not sure if it's entirely legal - or maybe they have just found a clever loophole.