How are you defining baseline? Is this just for electricity?
In the middle of the night when we're in bed, our house is using around 0.112 kwh/h to support a full sized built in fridge, full sized built in freezer, two TVs and a Playstation on standby and one computer on standby, plus a hoover that's always on charge and two bedside charging cables usually with a tablet or phone charging overnight.
That's 2.668 kwh per day.
BUT. You said you were home all day, so how can you record the baseline if you have lights on, are cooking, and so on? The baseline is what it takes to run your house with no activity.
If your overnight usage is unusually high (can you see it online or in an app? I started writing times and activities down because the Octopus in home monitor doesn't work, but I always have a graph the next day) - look for the following culprits:
Any sort of septic tank that uses a macerator - some of those turn on half hourly
A boiler in a poorly insulated space/house that has to turn on and off regularly because it can't keep the heat at the temperature you have set
Bloody Underfloor Heating with a pump that constantly turns on and off, as above
^ all of those three things use electricity to turn on and off, very regularly if your setup is as dumb as some of our previous rentals
Immersion heater attached to water cyclinders - those cost a bomb, but it would be far, far, far more than 10kwh per day
'Hidden' timers. Turns out we had a timer in the loft crawl space to turn hot water on when we don't need it.
'Hidden' water cyclinders. Just as above. We were told we had a combi boiler for this rental, which was true, they just failed to mention the bloody thing was set to heat two hot water cylinders up there in the loft.
In terms of day to day usage, I've been measuring mine like a hawk. Here's some info:
(new) Double built in oven 25 mins + x2 air fryers 20 mins = 1.8kwh
(old) Dishwasher on 45 degree wash, 0.916kwh
(old) Dishwasher 65 degree fast cycle 2.513kwh
(old) tumble dryer on high 30 mins 1.119 kwh
(old) tumble dryer on low 30 mins 0.812 kwh
(old) washing machine 30 degree quick wash with 1400 rpm spin 0.21kwh
(middling age) large induction hob ring on no. 5 out of 9 for 20-30 mins, 0.38kwh
(middling age) Dyson hot air fan on no. 9 out of 10 - 2kwh per hour
(new) fancy espresso machine, 0.33kwh per coffee (https://www.amazon.co.uk/dp/B00NPYDJ6U?ref=ppxhzsearchconndtbfedasintitle2)
(new) other half's PS5 when in use, 0.4kwh per hour
The biggest surprise to me was the two air fryers each using about 0.5kwh for 20-25 minutes. I thought they were meant to be vastly more energy efficient than ovens. Or maybe I'm getting them confused with the slow cooker? Anyway, putting my double built in oven on for 1/2 hour uses about 0.9 kwh so if I'm using x2 air fryers thinking it's more economical, it's seemingly not, especially since the oven has two shelves.
I'm going to run further tests on those today because I'm struggling to believe that result is real.
(they are big - https://www.amazon.co.uk/dp/B00D8WW6Q8?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1)
Anyway, I hope that helps a bit in some way.