
I'm not familiar with the english law, so I looked it up and the same rules seem to apply. You can use a dog, not more than 2 at a time, to flush a fox, or below ground to locate a fox as long as..
The first condition is that the stalking or flushing out is undertaken for the purpose of preventing or reducing serious damage to game birds or wild birds (within the meaning of section 27 of the Wildlife and Countryside Act 1981 (c. 69)) which a person is keeping or preserving for the purpose of their being shot.
(3)The second condition is that the person doing the stalking or flushing out--
(a)has with him written evidence--
(i)that the land on which the stalking or flushing out takes place belongs to him, or
(ii)that he has been given permission to use that land for the purpose by the occupier or, in the case of unoccupied land, by a person to whom it belongs, and
(b)makes the evidence immediately available for inspection by a constable who asks to see it.
(4)The third condition is that the stalking or flushing out does not involve the use of more than one dog below ground at any one time.
(5)In so far as stalking or flushing out is undertaken with the use of a dog below ground in accordance with this paragraph, paragraph 1 shall have effect as if for the condition in paragraph 1(7) there were substituted the condition that--
(a)reasonable steps are taken for the purpose of ensuring that as soon as possible after being found the wild mammal is flushed out from below ground,
(b)reasonable steps are taken for the purpose of ensuring that as soon as possible after being flushed out from below ground the wild mammal is shot dead by a competent person,
Pretty similar to the law in Scotland. I guess then that there is no harm in asking for help to get rid of them.