Eleanor Wilson (pictured right) arrives at Bristol Crown Court with a male companion for the start of her trial today

A 16-year-old boy struggled to cope when his science teacher told him she was pregnant with his baby and would have an abortion after the pair had sex in an aeroplane toilet, a court heard today.

Ellie Wilson, 29, of Dursley, Gloucestershire, allegedly performed a sex act on the boy in their seats and then led him into the cubicle where she carried out another sex act.

The pair then had intercourse while she was perched on one leg in the cramped toilet on a flight back from a school trip to Africa, Bristol Crown Court heard.

She later allegedly told the boy she was pregnant and would have an abortion, which was 'hard for him to comprehend'.

The 16-year-old said in a recorded police interview: 'I asked her if she regretted what happened on the plane. She didn't regret it - there were no regrets.

'I expressed my worries at this point about a potential pregnancy and she said "you don't have to worry I'm on the injection".

'I said "I just get really paranoid about unprotected sex".'

The pair allegedly went on dates to Tintern Abbey, near Gloucestershire, and Ashton Court Estate in Bristol.

The boy said: 'It wasn't really a teacher anymore, it was like having a girlfriend. I was very confused and very excited - very overwhelmed I guess. A woman aged 26 who has a degree, a nice house and a car.

Former physics teacher Wilson (pictured) was banned from the classroom after a sixth-former claimed she had sex with him in an aeroplane toilet on the way back from a school trip

'She spoke about her partner and explained that she wasn't happy with him. She said he was abusive to her which was hard for me because I cared a lot about this person and there is nothing I can do to help.

'She told me she was pregnant. I said "I thought you weren't going to come back and tell me you are pregnant". I would not be able to provide for her child.

'I'm looking at this teacher and everyone is calling her "Miss" but I know she's got my baby inside of her.'

The pair went on dates to Nando's and a park - and he bought her flowers and chocolate in the belief they were in a proper relationship, the court heard.

But their 'clandestine relationship' was allegedly exposed when a jealous friend of the alleged victim tried to blackmail Wilson into having sex with him.

She refused to comply and confessed to her superiors at a secondary school, which cannot be named for legal reasons. Wilson denies four charges of sexual activity with a child by a person in a position of trust in August and September 2015.

The opening of trial heard the boy describe in detail how the sexual encounter unfolded on a flight back from a school trip to Africa.

He said they were both drunk from the complimentary alcohol when Wilson - who had a boyfriend at the time - began kissing him.

'I was in shock,' the boy said in a police interview played to the court. 'She kissed me properly, on the lips. There was a lot of body touching.'

He said she 'slid her hand down my boxers, there was a little foreplay', adding: 'That went on for a bit. Then she proceeded to go into the toilet. She called me in.

'I walked in, closed the door and locked the door. We proceeded to kissing and touching and at this point she had my hand down her boxers.

Wilson, 29, has pleaded not guilty to abuse of position and sexual activity with a child

'From there, she pulled down my jogging bottoms and she was placed on her knees. My back was against the wall and she was knelt in front of me. Then when she stood up my trousers were down anyway and she pulled her trousers down.

'She moved her left leg up and I held it in my right arm with her foot against the door. It became difficult, it wasn't working - she's very tall.

'She demounted and turned over... so her hand was pressed against the back of the toilet and here we had intercourse. I slid my hands up her top through her bra.

'She turned around to face me. She sat down on the toilet - at this point I'm down onto my knees and we carried on having intercourse this way.'

He said that after they had finished having sex, 'she stood up and got dressed and we had a conversation about how to get out of the bathroom. We came out sat down where we were sat at the last point'.

Virginia Cornwall, prosecuting, told the court how the pair became close during the outdoor camping holiday to Africa.

They would 'pair up' for activities and stay up late talking after other teachers and pupils had gone to bed, which led to an 'erosion of boundaries'.

She held his hand on the coach back to the airport, where the group caught an Airbus flight back to the UK.

All the teachers and pupils were drinking on the flight, and the victim described himself as 'fairly intoxicated' when the sexual encounter took place.

The boy, now 19, said in the police interview: 'We spent a lot of time together. We were on a coach it was a four-hour journey to the airport.

'On the coach everything seemed normal. We were sat in (the) back row - I noticed that she was asleep and she touched my hand a little bit. I moved my hand.

'It all kicked off from there. We boarded the plane and had alcohol - it was a long haul flight so all your drinks are free. We were probably drinking too much.

'I was fairly intoxicated. We sat chatting for a bit. We were just talking. It all got a bit touchy - of course I am a bit drunk and I touch her back.'

Wilson confided in the boy that she was pregnant at school a month later, the court heard.

Ms Cornwall said: 'The single incident on the plane... she told him, had led to him making her pregnant. She told him because she was scared and she didn't know what to do.

'She intended to have an abortion. She kept this entirely from her partner. This was difficult for (the) pupil to digest, to understand.'

Ms Cornwall described Wilson, who was a science teacher and head of Key Stage Four at the school - as a 'risk taker'.

She said: 'This defendant was in 2015 considered a bright and capable teacher. She was a science teacher. Not only was she a science teacher regarded highly by colleagues.

'She was however a woman who had a different side to her. She was a woman who was having a clandestine relationship with a 16 year old pupil. She is a woman who is a risk taker.

'These are offences alleging a breach of a position of trust. We assume, expect and want our teachers, our social workers and those that look after children and educate them to behave in a way that is not predatory that is not sexual.

'It was the circumstances in which the two interacted on the school trip that led to an erosion of boundaries and it was her responsibility as the adult to ensure there was no erosion of boundaries.

'She was a 26-year-old woman, he was a 16-year-old boy.'

Describing how their relationship evolved on the trip, she said: 'They camped out - it was an outdoor based activity programme, camping cooking their own food.

'When there was pairing up, pupil said often they would be paired up together. They spent a lot of time together during activities. It was her choosing to be with him.

'There were late night chats where others had gone off to bed in their tents. The sorts of chat that he was unfamiliar with.

'(On the flight back) the 16 and 17 year olds were able to drink. The adults were drinking. It was alcohol that you may find on the evidence which contributed to a lack of inhibition on the part of this defendant - the intimacies that had built up and the attraction that had developed were realised in what was close contact on the plane and flirtatious touching.

'She had become aroused and sexually interested by the pupil and beckoned him into a toilet on the flight and it is then that they had (sex).'

The relationship was allegedly exposed when another pupil tried to blackmail her.

Ms Cornwall said: 'Another pupil became aware of what had happened and started emailing Ms Wilson threatening to expose her unless she in turn said she would have sex with him. She engaged with this blackmailer.

'Instead of going immediately to a superior she tried to deal with it herself. It isn't I suggest to you a usual reaction. She tried to cover it up until it got to a point where she couldn't cope with it.

'She told the deputy head in middle of February 2016 and the school monitored her emails and police were informed. The child (who emailed her) was dealt with and removed from the school.'

Wilson has been struck off on recommendation from the National College for Teaching and Leadership. The trial continues.