You can rely on Unifix's wall plugs, which have the strength to be the most reliable mate you could ask for.
Since being pioneered by Unifix in the 1970s, the plastic wall fixing plug has been a trusted companion of the plumbing and heating industry for the last 25 years.
An all metal cavity fixing suitable for use in plasterboard and other cavity applications. 2 spring loaded legs open up in the cavity to give a solid fixing.