A blanket refusal on animals. All of the Consumer Rights Act 2015 is being on an English dictionary definition of the word “unreasonable”.
However a landlord can charge an extortionate amount of money for complete redecoration and cleaning of all soft furnishings when the animal moves out because you may want to to be allergy free for any new tenant coming in.
What is important here is whether she has the landlord’s signed tenancy agreement because until she has that there is no tenancy.
As such, she is free to walk away provided they give her the deposit back but she is unable to enforce moving in.
Don’t be at all surprised if the landlord/tenant refuses to return the holding deposit in which case, give them until 4 PM next Friday (in writing) after which she will issue Small Claims Court proceedings without further notice.
Don’t hang around. The new Moneyclaim beta system is easy to use: https://www.gov.uk/make-money-claim
the new system is much better than the old government Gateway system.
You can prepare the proceedings now, at your leisure, save them, and then just pay the fee and press the button when the deadline in your letter before action, expires.
It's then just a case of following the court process and responding to any emails that you receive.
Thank you for letting me assist you with your legal question. I am glad that I was able to help.
I am not certain whether that answers the question for you or not, but I am happy to answer any specific points arising from this.
It will be my pleasure to help you again either further with this or any future questions you have