Pretending that this is anything but a spurious distinction in this case, you're still wrong as the UK has absolutely admitted to using depleted uranium rounds in combat.[1] If you believe that Russia has not used depleted uranium (and why should you?) it is not because of any humanitarian concerns because they absolutely have used tungsten rounds in combat and tungsten is also a toxic and carcinogenic metal and prone to the same kind of particulate contamination you claim about depleted uranium.[2]

1. https://www.gov.uk/government/publications/depleted-uranium-... 2. https://en.wikipedia.org/wiki/Tungsten#Health_factors