when you state a bailiff cant do this etc, point us in the direction of the law that says he can not
So for starters:
A debtor can remove right of implied access by displaying a notice at the entrance, Lambert v Roberts  72 Cr App R 223.
Placing such a notice is akin to a closed door but it also prevents a bailiff entering the garden or driveway, Knox v Anderton  Crim LR 115 or R. v Leroy Roberts  EWCA Crim 2753
A person having been told to leave is now under a duty to withdraw from the property with all due reasonable speed and failure to do so he is not thereafter acting in the execution of his duty and becomes a trespasser with any subsequent levy made being invalid and attracts a liability under a claim for damages, Morris v Beardmore  71 Cr App 256.