Ford Fiesta Mk7 hazard warning lights not working

[TimeforTea]

Hi, just wanted some advice from the great and the good on this forum, as per the title really:- Ford Fiesta Mk7 hazard warning lights not working.
Indicators all work, bulbs all fine, when i unlock car all indicator lights come on briefly (this is normal i think), however when pressing hazard switch in car no hazard lights work. Is it really just the switch or is it more complex.
Thanks for any help (ps also posted in Home Mechanics)