Tourette's campaigner John Davidson, the inspiration behind the film I Swear, has made headlines around the world because of tics related to Tourette's syndrome. But what is the everyday reality of living with the often unpredictable condition? For 22-year-old Seren Jaye, her tics dictate whether she leaves the house or not. She experiences motor twitches, such as jaw jerks, vocal tics and coprolalia - involuntarily using obscene or offensive language - which she says can be "embarrassing" when she's in public. Silence or needing to be quiet is "really, really difficult", she says. "I can't go into a library. "Even if I'm having a day when my vocal tics aren't even that bad, going into a library will make them 10 times worse." Tourette's syndrome has been in the news after Davidson ticked a racist slur while black actors Michael B Jordan and Delroy Lindo - both stars of the award-winning black horror film Sinners - were on stage at the Baftas last Sunday.…