Board Thread:Show-Related Questions and Answers/@comment-25084696-20140621132711/@comment-4975807-20140621213413

Baelfire/Neal mentioned to Mulan in "The Heart of the Truest Believer" that after he fell into the portal, he focused his thoughts on the Enchanted Forest, which is the reason why the portal took him the EF. It is plausible that the very first time Baelfire went into a portal as a young boy, he was thinking of a land without magic, so the portal took him to London.