Rabbi pinchos roberts – is one of the most senior litvishe rabbonim in lonodn, has regualrly told his kehilla “even if ten doctors would say something safe and one would say it’s dangerous would you dream of not listening, so too the eiruv…
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If i am not mistaken he has discussed the matter with R eider zt”l and fet that R’ moshe would have ossered.
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PLease say which eiruvin before the wat used shi’ur chazoin ish lekula