Morning,
R08/P1500 means on runway 08 the IRVR readings are all in excess of 1500m.
The code you've seen is the MOTNE code. You can find out more information here...
Weather (MOTNE)
Your code, R08/6102// decodes to:
R08 = Runway 08
6 = type of deposit = Slush
1 = Extent of coverage = Less than 10% runway covered
02 = depth of contamination = 2mm
// = Braking Action - // = not reported or runway not operational.
Hope this helps
high-flyer