Pathology specimens would be in jars of “formalin” which is usually in concentrations of 10% to 25% ,, at higher concentrations it would be flammable... this is not good fuel,, this is just a cost savings measure on whatever the UK equivalent of “stericycle” is. ,, to just point out the fetal remains paints the wrong picture ,, I’m sure they’re incinerating biopsy specimen , every cancerous tumor and every diabetics limb that they remove to save costs ... This is the “national health” and they will do anything to save costs.