Guy breaks down during a blatt through the sticks...he finds a country pub and goes in to use the phone. As he walks in, all conversation stops and all eyes are on him...nervous, he goes to the bar. Landlord says 'you arnt from round here are you...have a drink on me' The guy asks what the locals drink, and the landlord replies 'pint of real ale with a rat-top' The guy looks around the bar and true enough sees loads of pints with dead rats floating in them...'er, I'll have a half then' he says. The landlord duly pulls half a pint, then grabs a rat and chops it in half, putting the tail end in the glass.
The guy takes a deep breath and raises the glass to his lips...just then, the chap next to him grabs his arm and says ' heck, young man, you cant drink shit ale like that....it has no head on it'