What should one do if they've just started making the berakha on bread and suddenly realised that they'd forgotten to wash? Should they
- continue making the berakha, and eat the bread without washing;
- continue making the berakha, have a mouthful of bread and then go and wash (either with or without a berakha);
- change the berakha into one for washing their hands, go and wash their hands and then come back and make a berakha over the bread;
- stop the berakha wherever you are up to and then go and wash with a new berakha;
- or do something else?
This question speaks of the circumstances in which a person might have forgotten to wash, but presumes that the meal is already underway. I'm only asking about a situation in which you realise that you haven't washed when you've only just started making the berakha over bread.
Also, for the purposes of this question I'm assuming that the person making the berakha has already said God's name (if they've only said ברוך אתה, or only ברוך, it's not really a question).