The girl groomed by Adam Johnson told a schoolfriend that the former England footballer “offered to meet her for money” and gave her £50 for a trip to London, a court has heard.

The friend also told jurors that the then Sunderland midfielder asked the alleged victim “for a naked picture” on the messaging app Snapchat.

Giving evidence via videolink at Bradford crown court on Wednesday, the witness said: “She [the complainant] said that they talked on Snapchat and he’d asked her to send a naked picture and that’s all I can remember about it.”

She added: “She told me that she’d been texting him before she went away and he offered to meet her for money.”

The girl, who cannot be named, is the first of the alleged victim’s friends to give evidence against Johnson.

The footballer, who has been capped 12 times by England, denies two counts of sexual activity with a child. He has admitted grooming and one count of sexual activity with the girl, then aged 15.

In an interview with police, played to jurors on Wednesday, the teenager’s best friend said she did not believe her story at first. “I didn’t believe it at first but then the next night I had seen some messages where he had said something about just wanting to get her pants off,” she says.

She later adds: “It’s not something I believed because he’s like a footballer and he’s famous and she’s only 15.”

Under cross-examination by Johnson’s counsel, Orlando Pownall QC, the friend said the alleged victim claimed that the footballer had given her £50 for a trip to London.

The teenager bought underwear for her schoolfriends and claimed Johnson gave her the money for it, jurors heard.

Pownall said: “She told you face-to-face that she received a text message from Adam Johnson saying ‘let’s meet up in a car park.’

“She told you that Adam Johnson asked her if she needed money to go to London with and she said he gave her £50.”

The friend agreed.

Pownall went on to say: “She brought you presents from London, underwear sets and a couple of other things. She told you she had paid for the gifts with money Adam Johnson gave her.”

The girl agreed and Pownall said: “Is this an example of what you have come to expect – that your friend is someone who can exaggerate?”

The friend said: “Yeah.” She added that she had not believed the girl’s story about the cash.

She told police the girl agreed to get a signed shirt from Johnson after they made contact on Facebook. Jurors heard that Johnson asked for the alleged victim’s number to send her WhatsApp messages.

She said: “He [Johnson] was her favourite footballer, she didn’t actually believe it was him. Me and her go to the football matches and we always stay back for pictures with the players. After, he messaged her to to say: ‘Was the picture OK?’”

The friend told officers it was Johnson who initiated the meeting with the girl and that “she didn’t want to at first in case it wasn’t actually him.”

The court has heard that after giving the alleged victim a signed shirt, Johnson texted her to say: “You owe me”, and later asked for a “thank you kiss”.

The alleged sexual activity is said to have taken place in Johnson’s black Range Rover behind a Chinese takeaway in County Durham on 30 January, on the second time the pair met up, the jury has heard.

The alleged victim was “different” after the alleged sexual encounter, her friend told police, adding that her interest in the footballer seemed to cool. “She seemed excited about it at first but after she started to realise what she had done because he had a girlfriend and a baby she started to act differently,” the friend told police.

“She wouldn’t go on about it as much, you could tell that something had changed. He was her favourite footballer, she would always talk about him before he even spoke to her. After all that happened she acted different and wouldn’t talk about him as much.”

Despite the girl’s interest cooling, she told a friend that Johnson wanted to meet up with her again but this time to have sex, the court heard.

“I knew he wanted to met up with her again the night before she went to the police and he wanted to have sex with her, she told me,” the girl’s friend told police.

The trial continues.