In my area, planning applications are sent to the FRS sporadically as there is no statutory consultation with FRS. Anyone can, however, object to a planning application, providing the grounds are consistent with those allowed under the T&CPA, so presumably, if there are safety issues e.g. apliance access, your authority could object (providing they know about it).
We are actively persuing local agreements to become more involved in the planning stages, particularly in respect of sprinkler installations, but it would have a knock on effect for other FS issues as well. I'm sure that on most occassions, where B. Regs consultations throw up problems, it is often too late to sort out matters that probably should have been dealt with at planning stage.