"She was extremely concerned and informed er work place, that envelope contained two letters in capital letters in different coloured felt tip pen they told her about himself and his feelings for her."

Reading extracts from the letters, Mrs Jacobson said Collins wrote that he was lonely, psychologically disturbed and had a long criminal history.

One letter read: "I am poor, on DWP, and live in a poor bedsit for poor people, I am unhappy. I apologise for writing to your home address. I got it for £17 the internet."

In the letter, which had writing on both sides, Collins wrote: "My name is Tony Collins, I am tall and have green eyes. I know you are married to Ben, I am unsuccessful in my life.

"You care a lot about people because it is in your nature, do not feel sorry for me Sara. Sara you are a lovely human being, sexy, attractive and an all round fantastic human being."

Mrs Jacobson added: "He said 'Sara I like dogs and horses and referred to her dog by name and to horses being psychic and feel our feelings.'

"Also in the envelope was a passport sized photo of the defendant. He said he had done his research online by himself."