Hello Mike, and Welcome to the forum..
fhb2 has covered a lot in his response and has certainly set out the legal reality quite simply.
There are two types of license issued by park owners to ‘van owners on holiday parks ( all parks that are not residential ).
1st Fixed term i.e. you are told in the license that you have “x” no of years with your ‘van on pitch.
2nd Annual Renewal . The sites decides at the end of each year whether you & your ‘van can stay another year.. This is sometimes referred to as “no age limit” but it is always at the site owners discretion.
Some site do any red of the 2 I.e. it’s initially a Fixed Term but at the end reverts to Annual Renewal..
Whichever it is it should be always explained in the T&C’s so as our friend it is essential you read the license thoroughly before committing to a ‘van& park.
As to myself I’m on a little rural park within theYorkshire Wolds just a few miles inland of the Yorkshire Coast Scarborough/Filey/Bridlington that you could be describing. I hope you find somewhere that works for you as well as “The Windmill Country Park” does for us,Linkback: https://staticforum.co.uk/index.php/topic,752.msg1980.html#msg1980