50cc
No, they're legal.
legal age limit is changing to 17
In the UK I believe it is 3 years.
any age all over the country
If you are a learner driver and have a legal provisional licence then yes(Edited clarification for European drivers based on discussion added)You can drive any type of vehicle listed on your full and valid licence if you have passed your driving test in a European member country:
Nope, they can put as much as they want in it.
You can operate a quad bike with a category B or B1 licence.
Not in UK law, I think, though you might be banned from any driving on the grounds of infirmity.
Where practical, at the age of 11 the children must have another room to sleep
are there any good bike parks in the uk?
In UK at least a full B1 you cannot ride a quad on a motorbike licence.you just need a full UK drivers license to drive a quad (if your in the UK), you also don't need to wear a helmet as its not a legal issue :D
Yes, there is a limit to the size of quad bike that you can ride on a full UK driving licence. If you passed your car driving test on or after January 19, 2013, you can ride a quad bike with an engine size up to 50cc. If you passed your driving test before this date, you can ride a quad bike with an engine size up to 125cc. It's important to note that these restrictions do not apply if you have a motorcycle licence.