Many thanks for the replies; it’s really put our minds at rest on how easy this can be done.
the reason why we have decided to give this a go is because we can not find anywhere local outside where its private, so this is the only other way round it, plus i guess it has its bonuses, when we have done we can clean up properly without having to wipe the grass stains from off our knees & explain to the kids how we got them LOL
Thanks again.