Quad bikes carrying terrier men, terriers, with all the tools of their trade, are present at every single foxhunt monitors attend.
And, what would a trail hunt or drag hunt want with terrier men, terriers, spades, drain rods, and all the sinister paraphernalia used in dig outs and other such horrors?

Independent review of the RSPCA’s policy on prosecuting animal cruelty - Stephen Wooler - September 2014:

"One notable feature of the files was the frequency with which hunts appeared to be accompanied by terrier-men usually mounted on quad bikes specially adapted with cages or containers to carry terrier dogs. Their use was routine in traditional fox hunting because of their suitability for flushing out foxes that had gone to ground. There is however no role for them in a lawful trail hunt."