Legal Q&A: problems in the service of notices

Question: I rent premises to a company on a yearly tenancy, which commenced on 24 June 1999 and is not protected by the Landlord and Tenant Act 1954. The lease says any notice may be sent to the tenant at a specified address or any other address notified to me in writing. I sent notice to quit to the company, expiring on 23 June 2018, by post to the address in the lease particulars on 20 December 2017. I was informed two weeks later that the company’s address had changed at the beginning of December. Is my notice valid? Answer:
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