Ok, if that's the case I wouldn't get rid of the sofa without at least putting your POV of events in writing to the Landlord*, and copy in the agent (if you've been dealing with the agent then the landord might not even be aware of the situation). Explain about the mix-up/confusion and why you don't need the sofa. I'd emphasise that you need your sofa bed for when guests stay, and/or it's a much loved family heirloom etc...lay it on thick. Say you are prepared to replace the sofa like for like when you leave, and come to an agreement as to the value of a replacement. Get this agreement in writing. If you throw out the sofa without his permission then the Landlord holds all the aces when he asks for compensation when you eventually leave. He might turn around and say it was a ?2000 Conran sofa when infact it was ?200 from Ikea...ergo lots of hassle you could do without. One possible alternative to your storage option idea is to ask if there is anyone on the Forum who is taking on an unfurnished flat, and would they like to 'borrow' the sofa...