Already had more ticks on new borns this year than ever, several ill and a loss. Massive deer population increase.we noticed more ticks as more deer (Roe in our instance) came about in recent years yes i suppose warmer winters muddled seasons have a bit to do with it as well. its the suitable height vegetation they like to climb up and jump of onto their host and the grazing sheep /cattle keep them down .
We use dysect or crovect to kill them when they are on the sheep dual purpose with maggot prevention.
only trouble is small not born very long lambs that aren't treated can get a lot on them, shouldn't get serious if they are farm bred and there is immunity to the diseases that's carried but they would be pretty uncomfortable i guess with a lot on them.
were a few mile from Dartmoor mind you but. still the same prob on long stemmy grass on copse/woods edges particularly. just try to shoot the Deer .
its all (free) management .by local farmers and landowners.