This might seem like a silly question, but what is the point in you moving out a month after probate when it is likely that it will take several months to sell the house? What does your brother hope to gain by having the house empty?
We are having to sort out my mother's house to get it ready to rent out now that she is in a home. My brother and sister have both been round a few times to get things that Mum needs ( it was a sudden move into care after being in hospital) sort out paperwork, empty the fridge and start to empty drawers etc. They make sure they are in separate rooms or remain apart if forced to be in the same area. I know that technically they should not be in the house but we can't just leave it as it was ( blood and faeces all over the bathroom and bedroom!) and as we were allowed to make care visits when mum was at home, they decided to crack on. I've not been round though as we felt that three people together would be difficult and I have some health concerns so am self isolating as much as possible.
We have to make weekly visits to check on the house to meet the insurance conditions anyway. The Property Company are now working again so we need to get some jobs done so tenants can be found. I'm inclined to wait until after lockdown but my sister is very impatient so I'm just letting her get on with it!