There was once a very ill squid. He didn't know whether his infection was bacterial or viral, he just knew that he felt terrible. He was weakly swimming along when a British shark came by and picked him up.
The squid said, "Hey, if you want a good meal, I'm not it. I have aches and pains and I'm running a temperature. "
The shark seemed to be delighted, and asked the squid to come with him. The squid realized that he could not feel worse and obliged. They ended up in a dark cave where another British shark was circling.
The first shark dropped his find and said to the circling shark, "Here's the sick squid I owe you."
(quid = slang for £1)