Im considering a stop in London prior to a short backpack round Italy &/or Germany, just trying to figure out how do-able it is..

So, heres my question, Whats the best way to get from Luton airport to the Jovi on the 28th? I was thinking i could fly to Luton, get a hotel there maybe, go to the gig, then back to my hotel and fly out of London Sunday...

I know its kinda off topic, but would really appreciate any help/advice.