I got back yesterday to find my bathroom had been entered again with my toothbrush charger unplugged. Weird. This morning I received an email from them overnight. Edit: Some complete weapon has also opened my bathroom window last night meaning it's now like a freezer.
It's very bad practice for a landlord to be going into a lodger's bedroom/bathroom on a daily basis without seeking agreement from the lodger in advance. Your girlfriend or a relative might be visiting and they might be undressed or using the shower or toilet when the landlord goes in. Even with the agreement of the lodger it is counterproductive behaviour which damages the landlord/lodger relationship.
Although, the landlord has exclusive possession of the lodger's room, the lodger still has a reasonable expectation of privacy and security. Everyone is entitled to those things unless they are in a prison cell! (In your case, it is totally unacceptable because they used a crudely modified AST agreement which guarantees you will be able to enjoy your rented premises without any interruptions from the landlord.)
Landlord said:
Just to reiterate please leave your bathroom window open when we're in the flat and during the night to allow fresh air into the room.
This is unreasonable. They cannot expect you to leave your bathroom window open whenever they are there and all night. That is not justifiable if they just want condensation in the bathroom to dry out, (leaving the window open for 3 hours, or so, after taking a shower should do the job). The night time temperatures have been so low recently that the bathroom will be very cold in the mornings and noise from outside may disturb you while you are in your room. If they are so concerned about keeping the bathroom dry then they should install an extractor fan which vents to the outside.
Landlord said:
Can you please make sure the shower head,taps and plug and shower door and bath is thoroughly scrubbed with a good bathroom cleaner such as Cillit Bang or Cif at least once a week.
Again, this is unreasonable. For an AST, they simply cannot order you to do frequent cleaning during the Term of the tenancy. They can only expect you to return the bedroom/bathroom in the same condition they were in at the beginning of the tenancy. (The walls could be covered in fungus during the Term but if you disinfect and repaint them before the tenancy ends then the landlord cannot justify deducting any money from your deposit.)
However, you are legally a lodger, (as no AST was created since the landlord was already living at the address when you moved into it), but it is still unacceptable for the landlord to expect you to thoroughly scrub your entire shower/bath and their accessories at least once a week with cleaning products nominated by him. (Even if they are prepared to supply those cleaning products to you for free.) It is simply not a reasonable requirement and no experienced landlord would do it. If they feel it is so important then they can do it themselves.
Landlord said:
Lastly I didn't mention earlier if cooking fish especially smoked fish please use the oven as opposed to the microwave as the smell doesn't go it stays in the microwave for days.
Again, for an AST (which they have supposedly given you) this requirement is not acceptable. For a lodger using a shared kitchen, it is acceptable, but is rather petty.
Given that they have violated two important requirements of their own rental agreement I cannot see how any judge could insist you live there for 12 months before you can get your deposit back. In the meantime, it could be a good idea to put a hidden camera in your bedroom to see if the landlord is doing anything inappropriate when he goes in there. If he is looking at/touching your personal possessions then a Judge will take a very dim view of him if the matter ever goes to Court. Also, having a record of how frequently he has been going into your room could be useful in Court, given your rental agreement's demands on the landlord's conduct.
If I were you I would give one month's written notice to quit and find better accommodation. £700 per month for that place is daylight robbery anyway. They clearly couldn't care less about making you feel comfortable or respecting your privacy.