Me, demonrail and porky would deal with the London end of the zombie killathon - it'll be a shotgun totin', Guinness-guzzling, amphetamine and amyl nitrate snortin' hoedown. Our vehicle of choice would be whatever tank demonrail likes, and the music that would blast out of our tank would be this:
http://www.youtube.com/watch?v=H6Vw402IaII