asked the President of the Board of Trade when and where the Commissioners of Northern Lighthouses propose to establish further radio beacons?

I am informed by the Commissioners of Northern Lighthouses that the only radio beacon proposal which they have at present under consideration is for the establishment of such a beacon on the Isle of Stroma in the Pentland Firth.

Are any arrangements made to radiate signals in case of emergency?

This is a proposal to establish a beacon. It is not an established beacon.