What you do next will depend on the reason why you have been served with the notice.
If you have been given notice because of a breach of the tenancy, for example rent arrears, you me able to negotiate with the landlord to withdraw the notice if you pay off the rent arrears. If you need advice contact BHT Sussex (formerly Brighton Housing Trust (contact details below).
If you are being evicted for rent arrears see the Rent arrears self-help guide.
If your landlord has given you notice and there is no chance of preventing your homelessness, for example, the landlord is selling the property, you will need to start looking for another place to live; see the self-help guide ‘finding accommodation’.
If you apply for social housing through the housing register you are likely to wait for years before being rehoused. You will need to start looking for alternative private rented accommodation.
You are allowed to remain in the property after the date to leave on the notice. Your landlord will need to apply to the courts to get a possession order. You may be liable for costs if your landlord applies to court and you do not have a defence to the possession claim.
If you leave the property before you have to, you may be found intentionally homeless. Remaining in the property gives you more time to find alternative accommodation.