I reckon Martin will be cover for the first team. Trotman is off back to Preston in January, and unless we manage to keep hold of him for a while (which would be great) we would be left with Jaidi, Perry, Thomas, Martin and Lancashire (Out on loan potentially). Personally I would have Jaidi and a match fit Thomas at CB. Perry is getting on; Martin will provide cover for now, and I reckon he is an investment for the future. IMO of course.