Thanks its a solid wall behind the panelling. The panelling is the type that is hollow in the middle that's why I am concerned.As per @denso13, they're the fitting kit that would be used for a bar shower. Perfectly good fittings, just make sure there's something directly at the back of the panelling that can take the screws to mount them properly - thick piece of ply or wood - that will stand up to the constant use of the tap over time.
Thanks its a solid wall behind the panelling. The panelling is the type that is hollow in the middle that's why I am concerned.
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