tested

"It has already been tried and tested in other models, and that makes me more optimistic," said Madhavan, who, along with Polt and Hay, is a member of the BIO5 Institute.

The aromas the team tested on participants were vanilla, almond, lemon, lemon myrtle, eucalyptus, peppermint, vinegar and lemongrass.

The study was funded and developed by Corstasis, the developer and manufacturer of the bumetanide nasal spray tested in the study.

In August, the UK Government said winter fuel payments would be means tested and only go to pensioners on certain benefits.

In their study, the researchers tested the effectiveness of fampridine on working memory in 43 healthy adults.