The fuselage and wingtip panels are Tamiya Light Sea Grey (XF-25)
The inner wing panels are Vallejo Model Air (71051) Barley Grey
Not the best photo, so I'm not sure if you can see much difference. The inner panels have a slight purplish tinge.
EDIT: Note that there are two flavours of (RAF) Camouflage Grey. The original Barley Grey/Camouflage Grey (626) and "Dark" Camouflage Grey (629). I'm not sure what your model calls for, but I suspect it may be the darker shade.