Thank you for your response, and apologies for the late reply. I have not had access to emails since Friday.
Just to clarify a few points:
1) 'You cannot force this young man to leave unless she agrees' - Does that mean that the law would put the other children at risk of living with someone who is involved with an illegal drug. He has also been involved in dealing with the drug. Please note that I am not suggesting he be kicked out onto the streets. He would move in with his father or grandparents. I just do not want the younger (innocent) children sharing a roof with someone who actively and selfishly is involved in drugs.
2)'if your wife is the main carer of the younger children' - We are equal carers of the two youngest children as we are both the biological parents. What would the laws view be on these two living with me.
Do you recommend getting social services involved as I am of the understanding that they would take this extremely seriously and would more than likely him into care in order to avoid putting the other children at risk, at least while he sorts himself out.
I need to stress that we have been dealing with this for the past 2 years and have tried everything we can think of. I do not wish to be in this position, but he does not show any compassion or consideration for others and is only interested in his selfish wants. I cannot sit by and allow him to continue putting the other children at risk.
I look forward to hearing from you.