This usually indicates that the tree has an infestation of aphids. The ants 'milk' the aphids for their honeydew secretion. This secretion is also what causes black mould to form on the plants leaves. So, you need to tackle the aphid problem first. Either spray, but avoid doing this when the bees are about or blast them off with a hose spray.

i would do as volunteer sais and just get some ant powder to kill them if you hate them that much.

i was just going to say the same nosey .Ants like biting me so i usually make sure i have ant powder about ,
Saying that the ants are about early this year i think

there not to aparant here in sunny norfolk as yet hijuju.

i got bitten today by one of the little blighters, on my leg, and i had trousers on, so i didnt see it go up me leg

ouch lol