Never really had permo, spent most of my life hiding from plod on dark nights. Been stopped by plod at night and told 'I can lamp, just let em know i'm coming on'... I never did, never trusted em BUT i've always thought back, maybe they'd just rather know and leave me to get on with it.
I know this much, its permo you got, good local permo. And you've been asked yo rung em. I'd be on the phone to them feckers 5 days a week to 'let em know'.. They'd probably think your some jobsworth freak and soon get tired of that and probably give you a wide berth...