I know the OP is asking for UK, but Australia requires the pilot to be authorised to remove or install dual controls, and that will usually exclude the tail rotor pedals, which have to be done by a qualified LAME.
My MA (Maintenance Authority) for the 206 is:
4. Installation/removal of co-pilot cyclic and collective dual controls, not including tail rotor pedals;
Whereas the AS350 is:
3. Removal and installation of Co-pilots dual flight controls;