The nursery does sound chaotic, but:
Chef on holiday and leaving without working their notice . Not a lot the nursery can do. If they bring in a temp chef they will have to have an enhanced DBS, be used to catering for young children and prepare nutritions, healthy food for meals and snacks that meet current EYFS guidelines on this. The chef would also need to have a thorough understanding of any children's dietary requirements/ allergies and intolerances . Plus a food hygiene certificate.
The nursery ( if London based) should be able to source a children's food company that will deliver hot or cold lunches . They will not want to do this though due to cost.
Fire Alarm. If it was a drill drop off is not the ideal time to do so. However, there is the expectation that nurseries carry out fire and lock down drills regularly. Not having shoes and coats on not ideal, but our policy is that we have to evacuate or lock down the nursery in two minutes. Every fire drill or lockdown and how long it took to evacuate is recorded.
Room closure, again not ideal, but this would have been a last resort. The two year olds are on a1:5 ratio, but if the nursery do not have capacity to move staff or children around because babies need 1:3 ratio and over 3's 1:8 unless the nursery has a qualified early years teacher and the over 3s ratio is 1:13 when directly working with the children. Without these ratios the nursery would have no option, but to close they would legally not be able to operate.
Many nurseries do not like paying for agency staff and not all have their own bank team. Again, our policy states that agency staff, unless level 3 qualified and with a member of permanent staff cannot do nappies / toileting or sleep checks. That would take 2 members of staff out of the room and it would not be in ratio. This is a safeguarding decision.
Newsletter- no excuse for spelling or grammar errors. This should be proof read by the manager .
Nursery staff are human they are entitled to holiday and they get sick because of all the bugs that frequently populate nursery.