On 28th August the UK Governement published “Guidance for full opening: schools” (https://www.gov.uk/government/publications/actions-for-schools-during-the-coronavirus-outbreak/guidance-for-full-opening-schools?fbclid=IwAR0JgGSYccQueVQGd5d2oI42eWl48fvmA9NbXpRZxmbTDhmQK26-pBOUYVM)
The section on Music, Dance and Drama (https://www.gov.uk/government/publications/actions-for-schools-during-the-coronavirus-outbreak/guidance-for-full-opening-schools?fbclid=IwAR0JgGSYccQueVQGd5d2oI42eWl48fvmA9NbXpRZxmbTDhmQK26-pBOUYVM#music-dance-and-drama-in-school) gives further information which should be read. There is some detail but for now I repeat some information I shared in my blog from June 7th. (https://musicedquestions.com/2020/06/07/music-activities-in-schools-in-a-post-lockdown-covid-world-revised-june-7th/) TBH I am not a web genius so sometimes the link doesn’t work
In the USA, the NAMM Foundation has a batch of resources concerning instrument cleanliness.( https://www.namm.org/sites/www.namm.org/files_public/resources/COVID-19%20Instrument%20Cleaning%20Guidelines.pdf )
“Instrument Cleaning: Guidelines and Information”, has been written with advice from the Centre for Disease Control. The full article gives a description of how various parts of instruments should be cleaned. How often is discretional but where instruments are shared then it should be noted that the virus can remain on surfaces as follows
Brass – Up to 5 Days
Wood – Up to 4 Days
Plastic – Up to 3 Days
Strings – Up to 3 Days
Cork – Up to 2 Days
There is more specific guidance for pianos from the Piano Technicians Guild here[https://www.ptg.org/covid-19) and for guitars and microphones here (https://sheshreds.com/how-to-disinfect-musical-instruments/) Remember the products referred to are American
Andy Gleadhill (http://www.andygleadhill.co.uk) who is internationally acknowledged as an leading authority on teaching World Music comments on natural skinned instruments comments, “It is difficult to try to disinfect them as they are mainly goat skin and will react badly to strong chemicals. Also getting them wet is not a good idea as this will slacken the head and alter the tone. Sunlight is a good natural disinfectant particularly in hot weather. Other than this just good old – fashioned soap and warm water and dry the heads straight away. A hairdryer is good for this and will tighten up the skin as well.”
Don’t forget to look through this study from the USA which is education and schools focused (https://www.nfhs.org/media/4119369/aerosol-study-prelim-results-round-2-final-updated.pdf)
There is information on ventilation here which basically I read as if the air takes one hour to change in a room then you may use it for an hour, leave it empty for an hour and use it again an hour later. Here you are going to have to ask your building managers for advice.
I can see nothing in the guidance about masks except for on transport and this guidance seems to be changing daily. However in the USA they are saying mask everything in the music classroom so that’s teachers, children and wind and brass instrument bells.
No doubt here in the UK Music Mark and the ISM will issue their thoughts in addition to the already useful guidance they have on their websites, but I hope this helps.