article: Two mothers who dramatically rescued a baby and group of young girls from rising tides were horrified to discover onlookers filming the incident instead of helping them. An 18-month-old baby and three girls - aged three, six and eight - were trapped on a sandbank at Blackpool Beach while out walking during the school break. But when it was obvious they had found themselves in trouble, those perched on the nearby pier did nothing to help - instead, they took out their smartphones to record the drama. Two mothers saved the lives of three girls and a baby after the youngsters were trapped by the rising tide . The Mirror reported the two mothers held the baby and young girls' heads above the rising tide until volunteer lifeboats reached them. Lifeboat crew member Nathan Lee told the paper: 'They thought they were going to die. One mum was disgusted people were filming it all on cameras, not helping. 'A few more minutes and none of them would be here.' The incident serves as just another reminder of the dangers of rising tides after more than 60 spectators had to be rescued at the Boat Race in London on Saturday. Lifeboats were deployed to transport the onlookers from the shore after they became trapped on the edge of the River Thames. Video footage showed a group of at least 40 people stranded by the rising waters after watching the rowing race between Oxford and Cambridge universities. A boy, reportedly eight years old, was also rescued from an embankment after he became separated from his mother, while seven people were evacuated from Chiswick Eyot when they were cut off by the rising tide. The RNLI said it was a 'surprise' to find so many spectators in trouble and the number was 'significantly greater' than in previous years. Many were unaware that they would be exposed to the substantial wash from the flotilla following the races and from the rising tide, it said. As a result many were cut off and found themselves with limited options to reach higher ground. Chiswick RNLI station manager Wayne Bellamy said: 'This incident showed once more that the tidal Thames can catch people unaware.' Spectators line the banks of the River Thames to watch the BNY Mellon Boat Race in London on Saturday .
highlights: Two mothers held the children's heads above water amid the rising tides .
  Aged 18 months, three, six and eight, they were trapped on a sandbank .
  But onlookers ignored their cries for help and instead filmed the drama .
  It comes days after Boat Race spectators were rescued from the Thames .
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