I've had a look the Air Pilot Award 2010.
As a grade II instructor with IRTA I am getting paid under the "Co-pilot - Class 2" but I exercise the privileges a Command Instrument Rating. Total 51K
- B.1.8 A pilot who is required to carry out flight instruction using the privileges of an instrument rating will be paid the appropriate additional allowance as follows
Instrument flying rating - Percentage of standard rate%
Command or Class 1 - 732%
Co-pilot or Class 2 - 476%
Night VFR or Class 4 - 183%
Anyone able to shed some light if this is correct or what a Co-Pilot/Class 2 instrument rating even is? The award has no definitions for this which leaves you at the mercy of employer interpretation.