Looks like you have it sorted.
During our house move. I kept a notebook that was my bible. All the details of the house sale, house purchase, new mortgage. In this, I kept a diary of who I'd spoken to / emailed and about what. Really useful to refer back to.
I kept to-do lists eg:
Stuff to leave for buyer:
Letter with home details (alarm code, utilities company, meter readings, stopcock location, nearest GP / supermarket, train station and bus stop)
Bin collection details
Bottle of wine and biscuits
All keys and Home appliance manuals
On moving day:
Clean empty house
Take meter readings
Pass keys to estate agent
Supplier Cancellation: (track all refunds)
Gas & Elec, give final readings and process a change of tenancy
Water
Broadband & TV
Home Insurance
TV Licence
Council Tax
Set up at new property:
Post redirection
Home Insurance
Council Tax
Broadband
Utilities (take meter readings when first in)
Change of Address:
Keep a check list of all businesses to advise a change of address and whether it could be done by app, online, email, letter or phone call. If a letter, write it and stamp it ready to send once moved. Raise all draft emails ready to be sent.
Banks, driving licence, council tax, GP, dentist, optician, work & payroll, schools, mobile phones, pensions, solicitors for wills, GOV online tax ac & child benefit, car, health and life insurance, union, car leasing company.
Then it was going through all my shopping apps, eg ebay, amazon, paypal etc.
Agree with the emergency box with kettle, cups, milk, tea sugar, loo roll, light bulbs (sometimes the seller takes these) plates and cutlery. Also include scissors for unpacking.
Start using up all the food you can from the freezer / cupboard now.