Q.. Can a landlord enter rented premises?

A.. Only if a) the tenant has been given 24 hrs written notice of the entry which will be made during daylight hours; or b) a notice to quit has been given and the landlord will enter to show the premises to prospective tenants or purchasers.
Q.. When can rent be increased?
A.. Rent can only be increased on the anniversary date of a tenancy.

Q.. How much notice must the landlord give the tenant?

A.. Landlords must give tenants four months written notice before the anniversary date of a yearly or monthly tenancy.
Q.. How much can the rent be increased?
A.. Any amount.