Shasha at Malory Towers

Plans

So everyone with the exception of Gwendoline went to the library to take a look at the map. Gwendoline stayed behind and didn't even know about the second letter.
Darrell found the map of Cornwall and was checking for the street that was written on the note from the strange man.
The found it and it was not far from the actual talent show.
"Let's go and check that place out," said Zerelda. "I wanna see what that so-called 'talent show' is held."
"Don't you think it's dangerous?" asked Shasha. "Do you think we should tell Miss Grayling about it?"
"I suppose we should," said Darrell. "I bet she'll call the police on them."
"Yeah and lead them to that address he gave us," said Alicia. "The police can easily round them up that way."
So Darrell, Sally, Shasha, Sophia, Zerelda and Alicia went off to Miss Grayling office. Zerelda knocked on the door that has the word Headmistress written in bold letters.
"Come in," said a voice.
They entered and Miss Grayling looked up.
"Oh my! What a big company we have here!" exclaimed Miss Grayling. "What brings all of you here?"
"Well Miss Grayling, there has been a mystery here," began Darrell. "Zerelda recently applied for a talent show to perform her stand up comedy."
"That's great! I didn't know you can do stand up comedy," said Miss Grayling to Zerelda. "But all of you don't seem to be happy about it. Why?"
"Well...Zerelda can you just show her the letters?" said Shasha. "That way we can explain better."
"Letters?" asked Miss Grayling confused . "What letters?"
Zerelda took out the letters that she received out of her pockets and laid it in front of Miss Grayling. Miss Grayling still looked confused.
"I've received two letters that says that I am selected for the talent show," said Zerelda. "This one was given to Shasha and Sophia and this one I received in the mail."
"I see. So one of them is fake I presume," said Miss Grayling, picking up the letter from the strange man. "This one is definitely fake because it isn't even signed and isn't official."
"Yes that's what we have been thinking too," said Alicia. "We have decided that we tell you and you'll call the police to go to that address and have them round up all the rogues."
"Indeed that's what I'm going to do,right here, right now," said Miss Grayling as picked up the receiver of the telephone next to her and called the police.
She was on the phone for a good 10 minutes when she thanked the police and put the receiver back into its cradle.
"So the police said that you go to the address as written," said Miss Grayling. "The time will not clash with the actual talent show because the so-called 'talent show' will be held earlier at 5.30 p.m."
"So I'm gonna act as bait?" asked Zerelda, pale. "What if they catch me before the police can catch them?"
"They won't," said Miss Grayling. "They will be there much earlier."
"Okay then..." said Zerelda after a long pause. "I'll have to summon up all the courage that I have to do this."