Is it citrus they don't like? Perhaps I should sqeeze Jiffy lemon on? No idea what the active ingredient of marmite might be, but it I reckon you might repel most mamals as well as insects if you run up past the Hinchliffe smeared in a savoury sandwich filling.
Yes citronella, eucalyptus too I think. You could try rubbing yourself with a lemon or lime....might be a bit stingy though!!!!
Suspect many mamals would go for a tasty sarnie filling
Update on the marmite situation: I've been advised by my advisors your supposed to eat it. I have also been advised I'm a feckwit, not sure what that means? Any more advisors out there
'Feckwit'= witty charming young man most sought after at social events!