I have spoken to them about it and have told them that they do not need to go and they can refuse to go when he angry and abusive towards them, but they say they feel obliged to go because he kicks up such a fuss. Plus they say that some of the time he is ok but flips from being calm to mad in seconds with them.
The boys need someone to talk to about this. They are basically unwilling to rock the boat because they are afraid of him.
It's a terrible example of how a man should behave and it will cause them trauma the longer they are exposed to it.
Has this man always been so angry and unreasonable?
Can you and/or their mum afford a counselor for them?
Can you afford a solicitor?
Is the visitation by court order or an informal arrangement?
Be very careful if it is court ordered that this angry man doesn't accuse you and the mum of alienation of affection or interference with his time with the boys by offering them a safe place to go if he is being abusive.
Has the mum been cool/ok with the separation and visitation because she is afraid of this man's reaction if she were to speak up on the boys' behalf or to express anger on her own behalf?
If the visitation is court ordered, then compile a list of abusive behaviour and speech, and go back to court.
If not court ordered, then simply do your utmost to stop the visitation. Assure the boys that you will protect them from his response if they stop going. It is possible to get a non-molestation order if he really kicks off, which will stop him from making abusive phone calls or threats of any kind.
Call Women's Aid 0808 2000 247. Leave a message. They will call you back.
(And that bed is way too small for two lads to share).