I don’t have experience of this exactly - have been in the same situation and we just applied pressure and everyone waited!
I don’t think there is much you can get that is any real comfort other than exchanging contracts to buy - technically you could do that with a process to nominate a completion date in the future, but i am not sure of the issues that might pose (e.g. for any mortgage you need, plus you’d still potentially need to find somewhere to stay in the interim and wouldn’t have certainty how long for)
I don’t have experience of this exactly - have been in the same situation and we just applied pressure and everyone waited!
I don’t think there is much you can get that is any real comfort other than exchanging contracts to buy - technically you could do that with a process to nominate a completion date in the future, but i am not sure of the issues that might pose (e.g. for any mortgage you need, plus you’d still potentially need to find somewhere to stay in the interim and wouldn’t have certainty how long for)