Yes, longer plugs and longer screws are definitely the answer. These 60mm x 8mm plugs look ideal. They will mean I've got 30mm going into brick.
http://www.screwfix.com/p/fischer-high-performance-universal-plugs-ux8-4-5-6-x-60mm-pk100/20669
Thanks for all the help.
http://www.screwfix.com/p/fischer-high-performance-universal-plugs-ux8-4-5-6-x-60mm-pk100/20669
Thanks for all the help.
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