Pink spots on yellow roses


I noticed today that there is a lot of pinks spots/marks on my yellow roses. I know this sounds like a stupid suggestion but it is next to my pink roses. Is it possible that the colour from the pink rose has ran onto the the yellow rose because of the recent rain?
The other question is the roses are always droopy as the picture shows, almost like the bloom is too heavy for the stem!
Any suggestions would be amazing!
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If you have a look at the main 'Rose' thread, lots of good advice on there.
I know Iceberg is very prone to it, maybe this one is too?
I'm not sure I can see botrytis damage in the pics.
I get washed out colours and pink spots most frequently in summer when it’s hot ‘n dry, Lady Emma Hamilton is very susceptible:
Julia Child (aka Absolutely Fabulous) is a very heat tolerant rose but still gets them occasionally: