Update on this, for future modellers of 547 Squadron aircraft, these are the serial numbers and aircraft ID letters that I've been able to gather from my research cross referencing my grandfather Bill's logbooks and the Squadron ORBs. Although the subject aircraft on this thread is a GRVI I've included the ones for the GRV versions he flew in 1944 until those were replaced in case anyone is building one of those in the future. There are a whole bunch of GRVs dating from 20/3/44 (his first Op with 547) but unfortunately I don't have serial numbers for those as I don't have all the logbook pages. The ones I have listed here start at 6/7/44.
As for Leigh lights, some but not all of the aircraft were equipped with Leigh Lights in the early part of Bill's service with 547 and fortunately the ORB distinguishes these from the non LL equipped ones so I've marked them as LL where they did have one fitted. The fitment of Leigh Lights seems to have been completed during September 1944, coincidentally when the the GRVs were finally phased out. All of his GRVI missions were in Leigh Light equipped versions as far as I can tell and the number of night Ops seems to have ramped up significantly by then indicating that 547 was largely a night ops unit from then on.
In the GRVI column you'll notice a duplicate for 2V-H with different serial numbers, The original "H" EW299 was lost with its crew off the coast of Norway not long after Bill last flew in it.
GRV
2V-Q BZ821 LL
2V-G BZ979 LL
2V-C BZ879
2V-O BZ794
GRVI (all Leigh Light)
2V-E EW307
2V-F EW296
2V-N EV995
2V-P EW296
2V-H EW299 (Flew in this aircraft 15/10/44, it was subsequently lost on 28/10/44)
2V-Q EV933
2V-V KG860
2V-D KG898
2V-L EW316
2V-F EW296
2V-C KG917
2V-H KG867 (replacement for EW299)
2V-B KG869
2V-L EW316
2V-K KG917
2V-X EW294
Over to you modellers!