Has to be a hot roast beef brown baguette for me. Big thick steak sized chunks of mouth watering hot beef just carved into a large wholemeal granary baguette with a few onions and a lashing of butter and good old fashioned English mustard.
All washed down with a ice cold diet coke with a chocolate coated doorwedge of a flapjack.

That sounds fucking lush, although replace flapjack with one of the hobnob flapjack thingies
I had a steak sandwich in Cobh when I was in Ireland with a nice pint of ice cold cider on a boiling hot summer's day...top stuff.