Fitting Child seats for Negative Anchor

We are facing the problem of negative anchors in the rear of the disco. No matter how hard we try, the child seat works loose quickly, and its all because of the negative anchor fixing point on the arch. Sililar problem to the D1.
Has anyone found a solution to this.
Thanks

Not sure what a negative anchor is but what child seat for how old a child?

Negative Anchour is the position of which the anchor point sits. In the case of the D1 and D2, it.s the anchour point for the rear outer seats near to the door apature, it sits further foward than you would find in more conventianal set ups, i.e. the front sits have the anchour behind your hips.

We use the older style car seats which are held by the seat belts.
I suspect that your type ones would need additional anchor points to be created behind the seat line.

I think I know what you mean, our baby seat is the type where the seatbelt goes over the lap, click into the latch then over the back (rear facing seat) but i havent tried putting it in the RRC yet. I can ask my brother when I see him as he uses a child seat in his D2

Thanks guys. It has been a lot of thought and now I have engineered a solution