A married female teacher in the UK has been charged with having sex with a 15-year-old "special needs" student in the disabled toilets of the British Library.

Teresa McKenzie, 39, had sex ten times with the boy over the course of a year and made more than 600 phone calls and text messages to him in a six-month period, a court has heard.

McKenzie allegedly wrote romantic letters to her teenage lover and sent him a bag full of condoms with a pirate-themed note, the Daily Mail reported.

McKenzie referred to the boy in the letter as "my gorgeous pirate" and wrote that she "dreamed of sailing the seven seas of him".

"Yo, ho, ho my seafaring sweetie, I will love you forever and ever," the note reportedly read.

The pupil allegedly admitted the affair to his mother after an apparent suicide attempt.

During police interviews McKenzie admitted to writing the notes but denied having a sexual relationship with the student, who cannot be named.

Other teachers at the northern England school told police the couple had been seen "snuggled up" to each other and that he followed her around "like a lost dog".

McKenzie has been charged with seven counts of sexual activity with a child while in a position of trust.

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