Nice work so far. Don't know if it's included in the painting instructions (I haven' checked mine, and usually find Hasegawa and Tamiya inaccurate with RAF aircraft), but the trunking from the radiator was normally bare metal (silver).
The air bottles in the wheel wells were normally black, although I have seen one photo only, where they were a lighter colour, possibly grey/green. The yellow colour is an American I.D. colour for oxygen, not used at that time by British organisations or Forces.