Order made and thanks to all.
3 respirator systems (2 for the hospital and one for myself as there's cases where you end up at a hospital and they're short of breathing apparatus... me and another chap [a different hospital btw before anyone says they're from the media... or like cheese] had to hold our breaths last week whilst we swapped over battery packs as I was going out and his pack was dying... these batteries are way ahead and lithium ion aswell).
2 spare extra hoods which will go straight to the hospital as the hoods we have are slowly showing their age (I'll say no more) so these spare hoods might give them systems a new lease of life.
1 pack of 20 filters which need to be swapped per shift.. so mine will be done after 10 shifts but the hospital have plenty of their own... I hope
Thanks again everyone and I will endeavour to write our name (BearbonesBikepackingBreathingFund) on all the 4 hoods (and my name on my hood

) and a little message reminding staff to observe rule #1 so they'll hopefully treat em carefully and like their own. Feel free to suggest owt else if its constructive and might be feasable. But no promises

...