12 month contract with 6 month break clause is normal.
Sometimes an initial 6 month contract then rolls onto 12 month with 6 month break clause. I don't think you'll get a 2 month break clause.
If you start making demands now the landlord will see you as demanding / red flag.
You'll need:
Employee details (they do write to employee to confirm tenure / salary)
Credit check
References, if you haven't rented before, proof of mortgage payments
Holding deposit
6 weeks (usually) rent up front
(Our total deposit for a £1395 property was approx £2600
It it comes unfurnished, you will need to provide furniture
Normally an inspection at 3/6 months. You can ask for this to be yearly. After our first 6 months the landlord was happy with yearly inspections.
We also had to give them access to our online banking. We had to go on our joint account HSBC app and authorise for the EA to check on there for affordability.
Getting a rental is getting harder due to demand. So you need to look as squeaky clean as possible.
Our landlord is great. We asked upfront if he had any plans to sell and he has a large portfolio of properties and he's not selling in the foreseeable. Which in turn showed him that we aren't going to end the tenancy anytime soon.
We're looking to buy in approx 2 years.
www.rateyourlandlord.org.uk
See if your potential landlord is on here too.
Good luck!