Hi

Can someone recommend the best method of fixing a fairly heavy mirror to a
plasterboard wall that is tiled with ceramic tiles (bathroom wall)?

The back of the mirror has two standard slots to be hung on to medium -
large screws.

If the wall was brick etc. I would just use some heavy duty wallplugs but I
am not sure what to use on this wall. The tiles are 6mm thick, the
plasterboard is 12mm so with tile cement etc it is probably a little over
20mm thick. On a normal wall I would use screws that were 11/2 x 10 or maybe
1 3/4 x 10, is there a suitable plug that will allow me to use these?

Thanks