Which school was Harry meant to go before the Hogwarts letter arrived?

Stonewall High. Stonewall High was a state secondary school in the United Kingdom that the Dursley family had wanted Harry Potter to attend. The school uniform was grey, but as a strategy that helped him save money, Harry’s Aunt Petunia dyed some of Dudley’s clothes grey to create a grey uniform. Harry said it reeked like elephant skin.

Harry obtained a letter of admission to Hogwarts school of witchcraft and wizardry. However, he was not aware that he was already a wizard at the time. The Dursleys were quite deceptive in their tactics to ensure that Harry did not discover the letter. However, Rubeus Hagrid told Harry the truth about his heritage.

The correct answer is Stonewall High.
Harry was meant to go to Stonewall high before the Hogwarts letter arrived. The Dursely family had planned that Harry was going to attend Stonewall high. It was a muggle state secondary school in the United Kingdom.

However, later on, the same day that Dudley Dursley, who is Harry’s cousin, was telling him about the rituals and bully at Stonewall High, the letter of admission into Hogwarts School of Witchcraft and Wizardry arrived.

At the time, Harry himself did not know he was a wizard. This invitation letter to Hogwarts was hidden from Harry, so he wouldn’t read it, let alone accept the invitation. The letter was hidden in the Hut on the Rock. However, Harry got to know about his true destiny through Rubeus Hagrid.