Hollow wall anchors are quite good, but if you really want it done right.
Measure out on wall where intend to put brackets etc up. You'll want some timber, stud wall normally 75mm x 45mm approx. cut plasterboard out in area marked out for brackets etc.. Measure length between stud up rights normally 600mm centres but some older house different. cut timber to length slide it in and screw firmly to uprights. Then you will need to board and plaster patch.
Think you would be surprised at just how much weight plasterboard can carry when using the correct anchors without battens - kitchen wall cabinets and large radiators full of water.
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