Huge hugs to you both ((((?)))). Moving is one of life's stressors, big time. I have just sold my flat that I have owned for 25 years, and rented out for the past 15 years or so, as I actually live in our shared marital home, so very little packing, but gosh, the stress, the delays,the indecision about what to do with the many 'things' that one accumulates, etc, etc, etc.
Good thing in many ways that your buyer wants to move a month early, less time for him to pull out and hopefully you'll get here sooner and enjoy our good weather.
Re tummy bugs (if that is what it is) a paediatrician I worked with, always recommended flat Coca Cola - the taste was ok, and it contains lots of stuff, and helps children (and presumably adults) rehydrate.
Anyway, it sounds as though the situation has improved, and your move is speeding up - so you'll get to Harrogate sooner, and have a chance to rest yourself. So flowers ? and a final smiley hug ((((?)))).