A heavily pregnant woman was raped at gunpoint in her bedroom by a gang of armed burglars who broke into her home.
The 33-year-old victim, who was seven months' pregnant, was watching TV with her boyfriend when the balaclava-clad men forced their way into their North London home.
Her 39-year-old boyfriend was threatened and hit around the head with the butt of a sawn-off shotgun as they demanded the keys to their Audi TT which was parked outside.
The woman was then grabbed and forced upstairs by one of the attackers and forced to perform a sex act on him which police have described as 'oral rape'.
He threatened to shoot the couple unless she did what he said.
The men took the couple's grey Audi TT and other items including an iPod, cash, debit cards and a laptop from their Finsbury Park home on May 14 last year.
The car was found abandoned two days later in Portland Road, near Seven Sisters Underground station.
Police said details were being revealed only after other efforts to trace the men had failed, adding that a £20,000 reward is being offered for help in catching the gang.
Officers said the woman went on to have her baby without any problems.
Detective Inspector Robert Pack, the investigating officer, said he hoped 'allegiances had changed' over the past 14 months as he appealed for information.
He said: 'Every rape is a very serious crime but what makes this all the more shocking was that the victim was so clearly heavily pregnant.
'It was all the more traumatic because it took place in the couple's home.
'Concerns for the unborn baby can only have exacerbated what was already an emotionally and physically traumatic experience.'
He added: 'Allegiances may have changed over the last 14 months and we would urge anyone with information to contact us.
'There is a reward on offer of up to £20,000 and I hope there are people out there who are prepared to do the right thing and tell us what they know.
'Do you know the men who did this? Do you remember hearing anyone boasting about stealing an Audi TT around this time? We would like to hear from you.'
DI Pack added that the woman's baby was eventually born unharmed and said the couple are "doing okay".
The couple had been watching TV when they heard a noise outside at around 10.30pm. The boyfriend opened the front door to see what was going on.
He saw the three men, all wearing balaclavas and scarves, at the end of the path and tried to shut the front door but the men forced their way inside and shoved him to the ground.
The suspect who carried out the sexual assault is described as black, 6ft, aged 18 to 25 and stocky.
He wore a black balaclava, black jacket, black tracksuit bottoms and black shoes.
A second man was black or Asian, 5ft 6in and about 18.
He wore light grey tracksuit bottoms, black trainers and a zip-up jacket with red sleeves.
The third suspect, who had the gun was black, 5ft 10in, and aged between 18 and 22. He was wearing burgundy tracksuit bottoms.
Police said they were keen to trace the men if only to eliminate them from their inquiries.
DI Pack said he believes the men who carried out the attack either live locally or have links to the area.
He added: 'They clearly felt comfortable committing a crime at the top end of the scale which suggests they know the area.
'We need people to give us names to open up other avenues of investigation for this enquiry.
'It is unlikely that these men will not have spoken to someone about the robbery or about the fact that they stole the car.'
A reconstruction of the incident will be shown on BBC1's Crimewatch at 9pm tonight.
Click to view image: 'CCTV Image of wanted man'
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