The first dramatic footage of the Hatton Garden jewellery heist shows how the gang returned twice in three days to continue their audacious robbery  - as it is revealed police may have to pay out millions in compensation for ignoring the alarm. The six-strong gang dressed in high-vis jackets were captured on CCTV working throughout Thursday night having successfully broken into the basement of the building in the heart of London’s jewellery district. Shockingly, the footage reveals they returned again on Saturday - spending another eight hours cleaning out the jewels and cash left there for safekeeping. Scroll down for video . The Mirror has obtained the first pictures of the six-strong gang which raided Hatton Gardens last week . Images obtained by the Daily Mirror reveal the precise timings of the raid for the first time - as well as the fact they used wheelie bins to remove millions of pounds worth of jewellery and valuables from the safe. Scotland Yard tonight refused to confirm to MailOnline whether they had seen the footage before it was handed to them by the Mirror, but it is likely to place even more pressure on police already under fire for not responding to the alarm. The footage begins at 9.23pm – just four minutes after staff at the safety deposit centre lock up for the Easter weekend – as the first thief appears on camera carrying a black bin bag. It was unclear exactly where the cameras were situated, but at least one is aimed outside the building and shows a white van thought to be the getaway vehicle. Over the following four nights, half a dozen raiders are seen lugging heavy-duty tools, including massive bolt cutters and a red monkey wrench down to the secure vault. Each member of the gang is wearing builder’s overalls and high-visibility vests. At least one has a balaclava over his face, while others wear dust masks – but each one is partially reconisable. The first raider to appear has been dubbed Mr Ginger after the colour of his hair. Another, wearing a builder’s hat, has been referred to as Mr Strong and is seen carrying steel supports that may have been used for the diamond-tipped drill that police say cut through into the vault. The gang is thought to have hidden in an office before abseiling down a lift shaft and drilling into a vault . The Tall Man – who wears an Adidas tracksuit – carries two red tools up and down the stairs. Another, dubbed the Old Man because of his grey hair, later appears to struggle for breath in the footage as he lugs bags from the vault. Two other raiders have been nicknamed The Gent, for his smart brown shoes, and Mr Montana because he is wears a sweatshirt emblazoned with the word. Reports say that he has a shaved head, and possibly an earring in his left ear. At about 9.40pm the gang disappear into the building. At 7.52am on Good Friday, according to the footage, members of the gang can be seen again. The street camera captures the white Transit pull up to the alley. On Sunday, at around 6am, the gem thieves can be seen dragging heavy wheelie bins and several black bags back up the stairs. It has been reported these contained potentially millions of pounds worth of jewellery and valuables. The last trace of the raiders is recorded at 6.44am on Easter Sunday, when a white van pulls up and the gang load it with all the remaining equipment and disappear. Detective Chief Inspector Paul Johnson of the Flying Squad, speaks to journalists outside Hatton Garden Safe Deposit Ltd today following last weekend's burglary in London . Another suspect, riding a moped, may also be connected to the gang. The raid was not discovered until the following Tuesday . The thieves apparently thought they had covered all their bases when covering their footsteps, but had failed to realise they had missed the cameras. A source told the Mirror: 'This was clearly the work of a professional gang who planned this job down to every last detail. 'But they may have made a mistake in leaving this footage behind.' The footage came to light as Scotland Yard was forced to admit it did not respond to a burglar alarm triggered during the raid - which could make it liable for million in compensation. That failure to investigate immediately left the gang free to work uninterrupted over Easter and escape with gems and cash worth ‘millions and millions’ from 70 deposit boxes - as can clearly be seen in the video. Officers were informed that the warning had been triggered shortly after midnight on Good Friday. But they decided that the possibility of a burglary did not need immediate investigation. Instead, a private security guard is understood to have made a cursory check of the building. Last night, jewellers who rent boxes with the Hatton Garden Safe Deposit Ltd security firm accused the police of incompetence and threatened to sue them and the owners of the deposit company. One jeweller, a 63-year-old named Michael, said: ‘As far as I’m concerned the police have got a lot to answer for. Suing anyone is a last resort but it’s something I would consider.’ A gang of criminals broke into the Hatton Garden Safe Deposit Ltd over the Easter Bank Holiday weekend . Another jeweller called Ryan, who runs a business with his father in Hatton Garden, added: ‘It is just unbelievable that they could ignore a call from an alarm company.’ The deposit firm has also faced criticism over the building’s ‘antiquated’ alarm system. Security expert Seamus Fahy, 47, said: ‘It was a well-planned heist, but the lack of modern technology made it a lot less difficult than it should have been.’ A Scotland Yard spokesman said: ‘A grade was applied to the call that meant that no police response was deemed to be required. We are now investigating why this grade was applied to the call. ‘It is too early to say if the handling of the call would have had an impact on the outcome of the incident.’
CCTV images reveal how the six-strong gang worked through the night . Professional gang seen using wheelie bins to carry their ill-gotten gains . Footage revealed as Scotland Yard admits it did not respond to the alarm . Police force could now be forced to pay out millions in compensation .