您好，如果您的合约是fixed term tenancy, 而且没有提到加房租的条款，房东不得在租约期内加房租，更不用说赶你走了。参考以下法律：
24 Rent increases
(1) The rent payable in respect of any tenancy may be increased by the landlord provided all of the following conditions are complied with:
(a) the landlord shall give the tenant notice in writing of the increase; and
(b) that notice shall specify the amount of the increased rent and the day upon which the increased rent shall become payable; and
(c) the day upon which the increased rent shall become payable shall be not less than 60 days (or, in the case of a boarding house tenancy, not less than 28 days) after the date on which that notice is given; and
(d) the rent shall not be increased within 180 days after the date on which the last increase took effect; and
(e) in the case of a tenancy which is not subject to annual rent adjustment, the rent shall not be increased within 180 days after the date of the commencement of the tenancy; and
(f) in the case of a tenancy which is subject to annual rent adjustment, no rent increase shall take effect—
(i) less than 60 days (or, in the case of a boarding house tenancy, 28 days) after the notice required by paragraph (a) is given; and
(ii) other than on the specified date in any year or with effect on the next day on which any rent is to be paid within 28 days after the specified date in any year; and
(g) a landlord under a fixed-term tenancy—
(i) may not increase the rent during the term of the tenancy unless permitted by the provisions of the tenancy agreement to do so; and
(ii) may do so only in accordance with this section and any such provisions of the tenancy agreement; and
(h) where the Tribunal has made an order under section 25 and that order is still in force, the rent shall not be increased to an amount in excess of the amount specified in the order.