A man from Bolton was arrested during raids in Blackpool.
The 23-year-old was one of eight people detained after raids in the Bispham yesterday (Monday).
Police broke into an industrial unit off Wakefield Road after receiving calls suggesting the site was being used as a cannabis factory.
Around 300 cannabis plants with an estimated street value of £150,000 were recovered at the scene, police said.
Officers then went to a home on George Street, where a second cannabis farm - consisting of 100 plants - was found.
Det Sgt Steve Montgomery, of the Blackpool Criminal Exploitation Team, said: “These raids follow a major investigation by police in Blackpool targeting human trafficking and cannabis production offences.
“This operation has been on-going since July and has resulted in a number of arrests and the recovery of a significant amount of cannabis.
“We are committed to tackling drugs supply and exploitation of all kinds and we continue to work proactively to put an end to modern slavery.
“We welcome any community intelligence that may help to identify addresses where drugs supply and modern slavery may be taking place. If you suspect suspicious activity is taking place, please let us know. We take all reports seriously and will investigate thoroughly.”
The following people were arrested:
They are all currently being held in custody.
Det Sgt Montgomery added: “Human trafficking can also be a part of modern slavery as a person is moved from one place to another. This could be country to country, town to town, or even as simple as one room in a building to another. Even if a victim agrees to be moved, trafficking could still be taking place.
“Unfortunately, few people understand modern slavery and many confuse it with ‘migrant working’ or ‘illegal immigration’.
“Victims are generally living in fear. They don't fully understand what's happening to them and comply with their abusers in hiding the reality. We will continue tackling this issue and want to put an end to human trafficking and modern slavery in Lancashire.”
Police have advised that anyone concerned about modern slavery or human trafficking who is looking for support, should contact their helpline on 08000 121 700 or visit lancashire.police.uk/modernslavery.