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Hi, thank you for your message. It is for the landlord to decide the amount. You will need to try to negotiate with the landlord. You should write a letter stating your full claim and what you want from the landlord, a reasonable amount and attach all evidence to support your claim. If you want to dispute it further you will need to take the matter to court. I would advise that you find a solicitor in your area to represent you. . You can find a solicitor through the law society using this function: https://solicitors.lawsociety.org.uk/ (you will be able to search by area of expertise and location).
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