We exchanged on 14 December. So they had a good month to let us know they weren't happy. But, like you said, we informed them before exchange so I'm not sure if we're legally entitled to leave it? I made sure to inform our solicitor in good time just so they were aware and if we needed to do anything we had time. Didn't hear anything from their solicitor after ours had informed them.
We also reminded them the week before completion and received another message saying that it was fine and they had a spare. They asked if the washing machine would be in the house and I said no cos it had broken. So I'm not sure what is going on.
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I've no idea what they're doing. They've already got a washing machine cos they had a spare second hand one