To think there's someone living in my loft?

[BlueBananas]

On Monday morning when I returned from the school run the back door was wide open, I was a bit un-nerved, shouted hello and checked around, nothing seemed untoward or out of place so I presumed I'd left it open before I went. Fine.
Tuesday we didn't go to school, nothing to report.
Wednesday I closed and locked the back door and looked back at it as I was closing the front door, it was 100% shut and locked with the key in. Get back from the school run and it is wide open again. Now I'm freaked out.
We leave the key in the back door all the time to avoid puppy accidents while we're finding the key, so today just as an experiment I locked the back door and took the key to school with me. It was still shut and locked when I got in.
Now I've just been in the utility room, which is just off the kitchen (where the back door is) and it is part of a single storey extension so has a loft hatch, we've never ever been up there (I always kind of presumed it wasn't a proper loft) and as soon as I walked in I noticed the hatch had moved quite considerably, it was literally the first thing I saw as there is quite a gap around it so it has only happened since around 4pm; the last time I was in there.
The door to the utility room is always shut because the kids aren't allowed in there and I'm the only person in the house

AIBU to think the only logical explanation is that someone has recently moved into my utility room loft?

Please update us. Nothing more annoying than no update.

Police? Neighbour? Brother? Son? ANYONE! JUST CALL SOMEONE!

Yup, there's some one in your loft op!

Omg I thought I'd get lots of "calm down dear" type of responses, not saying call the police! Now I'm scared!
I have a partner but he's out, I'm going to ring him to come home and investigate, not a cat in hells chance am I going up there!

Do you have a catflap in that door? Could someone have put their hand through and up? And let themselves in?

I was watching police interceptors the other day and they arrested someone who was going into people's houses to use their washing machine, could it be that?

Oh shit this is some kind of wind-up. Why not call the police?

Don't be silly OP, there's no one living in your loft!!

It's a ghost

(If it were me I wouldn't be in that house alone until I had at least 5 other people there with me to conduct a thorough investigation!)

I'd be out of there like a shot! Please call someone!

Hello? Blue are you there? Anyone home?

Can you set off a fire alarm and see if there's any movement? while armed with suitable blunt object

But surely if you're hiding out in someone's loft and sneaking about when they're out you wouldn't leave a door wide open.

Dont go up there unless someone else is with you.

Yes - get your partner home pronto to check!

Are you by yourself with the kids OP? I would feel quite vulnerable in your position.

If you call the police and they search the place and there's nothing there the worst case scenario is that you feel a bit foolish. I'll bet they'll take you seriously though.

I'm assuming you have dc there, probably in bed so I'd knock next door and ask someone to come and look for you. With the phone in your hand and police on speed dial!

Can you lock your utility door?

Shit! I'd be crapping myself.

Move. Didn't you see Luther?

Sorry, OP, but I'm marking this so I see what happened after the cops had been!

Oh my god,where are your kids?Grab and run!

Oh shit yes that Luther episode was horrible. Get out NOW

God no, call the police!

Squirrels. My friend had them. I think it's squirrels.

Oh, does anyone remember the mystery attic thread where it turned out OP's FIL was conducting his secret cross-dressing life in her loft?!