After numerous years of myself and ex sharing drop off/collection of children it came to point where it was not appropriate for me to attend ex house due to conflict with a third party, I therefore refused to drop off stating because invariable conflict in front of children was in best intrests for non-resident parent to pick up/collect children from there home, he chose to refuse that and now drop off collection is via school - however because he now cannot get his own way he is stating I am denying or restricting access - this is not the case he can have the children whenever he likes - but he can come and pick them up, I have rec'd legal letter asking for ' an explanation, which he clearly has not told truth to his legal advisor and therefore I want to know can I be forced to drop off - legally I am making children available and that's all I have to do?