go to the above website
select the Nord de Guerre Grid
and type in
and select convert
the page that then appears shows the corresponding Latitude/Longitude and it now also automatically shows a Google map. Select the Satellite button and you can see the location relating to the coordinate Z5436 stated in the report. I must point out though, that this translator is slightly different to if you have an original War map but only by less than 50 metres (or so I found when mapping Operation Pistol)
Don't always use q at the beginning, if you look at the Nord de Guerre map, these initial letters vary
Thanks for confirmation of date of birth, matches The SAS & LRDG Roll of Honour entry for him.I have managed to confirm Uncle Jacks DoB as 27th October 1923 (Have a copy of his birth certificate). He was 22 when he died.