Have a gents shirt which has a few small blood spots from a nose bleed that we just cannot wash out. Any ideas?

Racey-pa is correct. You should have immersed the shirt in a strong solution of salt and cold water immediately. This will work for most stains including red wine. I usually leave in this solution for 24 hours and then put the item through a normal wash cycle in the machine. All items successfully cleaned with no staining.

Hot salt water. Causes the water in the blood which keeps it bonded to the fabric to come out.

Chris

This shirt should have been soaked on cold - very strong salty water as soon as the blood was noticed. . By washing it, you have cooked the enzymes into the material. Sometimes "proper" milk will remove blood stains but I think you will have to discard this shirt and buy a new one. OR dye it.

Try some kind of product that gets rid of stain maybe tide stainstick but blood is so hard to get out so good luck

As Chris said. Cold water clots blood, hot make it "runny"

washing up liquid x

Put hydrogen peroxide on it.