The gel is usually used as a thickening agent in toothpaste, ice cream and baby milk.

BBC: Seaweed gel could protect against HIV

Witness Claire McMillan told the High Court in Glasgow she had tried to give Mr Webster's second wife homeopathic cream for their baby son.

BBC: Malcolm Webster

Mrs McMillan told advocate depute Derek Ogg QC , prosecuting, that Mr Webster had been out with the baby trying to soothe him and saw the tube of cream when he returned.

BBC: Malcolm Webster