You want someone to give you a loop-hole so that you can break the law?
Try a solicitor, to defend you in court.
The 'research' that you have done has said you could misled you - it's the law - stop breaking it.
'They are doing no harm' - that shows your ignorant attitude - your neighbour reported you to the Police - of course they were doing 'harm'.
They are YOUR kids, YOU decided to have them, why on earth do parents think they have the right to foist their annoying children on others?
How on earth are they too 'little' at 10 years old to play on the local field?
If it's your wish to wrap your little darlings in cotton-wool, then invest YOUR time in YOUR kids (as a responsible parent should) and take them to suitable areas. And, if you don't like that it takes up all of YOUR time, then don't have kids - simple.
Try incessant bang, bang, bang, bang, bang, bang, bang, bang of casey football on tarmac for 8 hours a day.(Yep - that's what I get).
Casey footballs are leather and heavy. If they hit my £30k car, what would your reaction be to being sued for 2 grands worth of damage that your little darlings did when the heavy, leather, spinning casey football hit my car? It would very likely be denial (as it usually is).
Vulcan - are they playing with a leather casey football, on tarmac - 10 feet in front of your house, for 8 hours a day at weekends and 4 hours every night? If so, then it's odds-on you have an hearing aid that you can switch off.