Seems there may be more to it, as just looked it up and it is a holiday site which van owners are treating as fully residential.
This happens up and down the country, in some cases the salesman is misleading the buyer, or at least does not stress the importance of it being a leisure home, but in many cases the van owner hears what they want to hear.
The advice for future readers - NEVER EVER buy a static without fully reading, understanding and agreeing the contract - no contract, no purchase.
And if you are planning on full time residential use, buy a residential park home and use a (specialist) solicitor. to make sure it is a genuine purchase.
A bit more research indicates that earlier this year the local council started to investigate the park for breaches of the site licence - i.e, being used as residential when the licence is for leisure.
As mentioned in my first answer, the 2 commonest reasons for being told to leave are change of (site) ownership, and/or the use of holiday homes as residential.
Does not alter the fact that a refund of pitch fee and a properly calculated bill for site clearance should apply.