I have a court order to let the farther of my two children see them on week day and weekends.
My oldest son is 4 and his farther is telling him allsorts of things, he told him to wee in his bed,hit me,throw food on the floor. He also gives him things which he is allergic to, he took my youngest son to the doctors and told me lies, the doctor had said no such things.
My sollicitor and the courts don't seem to be listening and keep giving him access. Do I have to let them go when he is doing these things?

do i have to let them go when he is doing these things?

You sure do.

If your solicitor, and consequently the judge, aren't listening to you, perhaps you need to get another solicitor.